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--- visibility: public --- # JVM **repo:** [deephacks/awesome-jvm](https://github.com/deephacks/awesome-jvm) **category:** [[platforms|Platforms]] --- # Awesome JVM [](https://github.com/sindresorhus/awesome) A curated list of awesome JVM low level, performance and non-framework related stuff. - [Awesome JVM](#[awesome](/@harrisonqian/awesome/wiki/miscellaneous/awesome)-jvm) - [Bytecode](#bytecode) - [Garbage collectors](#garbage-collectors) - [Load tools](#load-tools) - [Languages](#languages) - [Machine Learning](#machine-learning) - [Memory and Concurrency](#memory-and-concurrency) - [Metaprogramming](#metaprogramming) - [Native](#native) - [Network](#network) - [Nix tools](#nix-tools) - [Profilers](#profilers) - [Runtimes](#runtimes) - [Virtual Machines](#virtual-machines) - [Resources](#resources) - [Communities](#communities) - [Documentation](#documentation) - [Media](#media) - [People](#people) - [Contributing](#contributing) ## Bytecode *Tools for bytecode manipulation and analysis.* * [asmtools](https://wiki.openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/display/CodeTools/asmtools) - Used to develop tools for the production of Java .class files. * [Byte Buddy](http://bytebuddy.net) - Code generation library creating [Java](/@harrisonqian/awesome/wiki/programming-languages/java) classes at runtime without the help of a compiler. * [Jitescript](https://github.com/qmx/jitescript) - Bytecode generation library similar to BiteScript. ## Garbage collectors *Garbage collectors for the JVM.* * [Azul Pauseless Garbage Collection](https://www.azul.com/files/wp_pgc_zing_v52.pdf) - Providing continuous, pauseless operation for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) applications. * [Balanced GC](http://www.ibm.com/developerworks/websphere/techjournal/1108_sciampacone/1108_sciampacone.html) - GC policy available in the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Virtual Machine for IBM WebSphere Application Server V8. * [Epsilon GC](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/jeps/318) - Completely passive GC implementation with bounded allocation limit, and lowest runtime performance overhead possible. * [G1](http://www.oracle.com/technetwork/java/javase/tech/g1-intro-jsp-135488.html) - The Garbage-First Garbage Collector. * [Shenandoah](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/jeps/189) - Ultra-Low-Pause-Time Garbage Collector. * [The Garbage Collection Handbook](http://gchandbook.org) - Book that addresses new challenges to garbage collection made by recent advances in hardware and software. * [ZGC](http://mail.openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/pipermail/announce/2017-October/000237.html) - Garbage collector optimized for low latency and very large heaps. ## Load tools *Tools that generate load and measure the system accurately without coordinated omission* * [Gatling](http://gatling.io) - Asynchronous non-blocking scenario driven load [testing](/@harrisonqian/awesome/wiki/testing/testing) tool for [testing](/@harrisonqian/awesome/wiki/testing/testing) HTTP servers. * [wrk2](https://github.com/giltene/wrk2) - A constant throughput, correct latency recording variant of wrk. ## Languages *Languages running on the JVM.* * [Ceylon](http://ceylon-lang.org/) - Object-oriented, strong and static programming language with an emphasis on immutability, created by Red Hat. * [Clojure](http://clojure.org/) - Dialect of Lisp created by Rich Hickey. Dynamically typed with emphasis on [functional programming](/@harrisonqian/awesome/wiki/programming-languages/functional-programming). * [Erjang](http://www.erjang.org) - A JVM-based [Erlang](/@harrisonqian/awesome/wiki/programming-languages/erlang) VM. * [Eta](http://eta-lang.org/) - Pure, lazy, strongly typed [functional programming](/@harrisonqian/awesome/wiki/programming-languages/functional-programming) language on the JVM. * [Frege](https://github.com/Frege/frege) - Pure [functional programming](/@harrisonqian/awesome/wiki/programming-languages/functional-programming) language in the spirit of [Haskell](/@harrisonqian/awesome/wiki/programming-languages/haskell). * [gojava](https://github.com/sridharv/gojava) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) bindings for Go packages. * [Golo](http://golo-lang.org/) - A simple dynamic language that makes extensive usage of `invokedynamic`. * [Groovy](http://www.[groovy](/@harrisonqian/awesome/wiki/programming-languages/groovy)-lang.org/) - Optionally typed and dynamic language, with static-[typing](/@harrisonqian/awesome/wiki/programming-languages/typing) and static compilation capabilities. * [Java](http://www.oracle.com/technetwork/java/javase/overview/index.html) - General-purpose, concurrent, strongly typed, class-based object-oriented language. * [JRuby](http://jruby.org) - Implementation of the [Ruby](/@harrisonqian/awesome/wiki/programming-languages/ruby) language on the JVM. * [JPHP](https://github.com/jphp-group/jphp) - PHP on the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) VM. * [Jython](http://www.jython.org) - [Python](/@harrisonqian/awesome/wiki/programming-languages/python) for the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Platform. * [Kawa](http://www.gnu.org/software/kawa/) - Extension of the Scheme language, which is in the Lisp family of programming languages. * [Kotlin](http://kotlinlang.org/) - Statically typed programming language for the JVM, [Android](/@harrisonqian/awesome/wiki/platforms/android) and the browser. * [LuaJ](http://www.luaj.org/luaj/3.0/README.html) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java)-centric implementation of lua vm built to leverage standard Java features. * [Nashorn](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/nashorn/) - Lightweight high-performance [JavaScript](/@harrisonqian/awesome/wiki/programming-languages/javascript) runtime in Java with a native JVM. * [OCaml-Java](http://www.ocamljava.org/) - Supports [OCaml](/@harrisonqian/awesome/wiki/programming-languages/ocaml) language v4. Generates plain [Java](/@harrisonqian/awesome/wiki/programming-languages/java) bytecode and have seamless [integration](/@harrisonqian/awesome/wiki/platforms/integration) with Java. * [Rembulan](https://github.com/mjanicek/rembulan) - Rembulan is an implementation of Lua 5.3 for the JVM, written in pure [Java](/@harrisonqian/awesome/wiki/programming-languages/java) with minimal dependencies. * [Renjin](http://www.renjin.org/) - JVM-based interpreter for the R language for the statistical analysis * [Scala](http://www.[scala](/@harrisonqian/awesome/wiki/programming-languages/scala)-lang.org/) - Strong and static programming language that combine object-oriented and [functional programming](/@harrisonqian/awesome/wiki/programming-languages/functional-programming) ideas. * [Xtend](http://www.eclipse.org/xtend/) - Flexible and expressive dialect of [Java](/@harrisonqian/awesome/wiki/programming-languages/java), which compiles into Java 5 source code. ## Machine Learning * [Deeplearning4j](https://deeplearning4j.org/) - Open-Source, Distributed, [Deep Learning](/@harrisonqian/awesome/wiki/computer-science/deep-learning) Library for the JVM. * [H2O](https://www.h2o.ai/) - Fast statistical, [machine learning](/@harrisonqian/awesome/wiki/computer-science/machine-learning) & [math](/@harrisonqian/awesome/wiki/theory/math) runtime. * [Smile](https://github.com/haifengl/smile) - Statistical Machine Intelligence & [Learning](/@harrisonqian/awesome/wiki/programming-languages/learning) Engine. ## Memory and concurrency *Tools and data structures for efficient memory layout and concurrent access.* * [Agera](https://github.com/google/agera) - Reactive Programming for [Android](/@harrisonqian/awesome/wiki/platforms/android) by Google. * [Agrona](https://github.com/real-logic/Agrona) - Library of data structures and utility methods that are a common need when building high-performance applications. * [Apache Arrow](http://arrow.apache.org/) - A high-performance cross-system data layer for columnar in-memory [analytics](/@harrisonqian/awesome/wiki/miscellaneous/analytics). * [bloofi](https://github.com/lemire/bloofi) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) implementation of multidimensional Bloom filters * [Cap’n Proto](https://capnproto.org/) - Insanely fast data interchange format and capability-based RPC system. * [caffeine](https://github.com/ben-manes/caffeine) - A high performance caching library for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 8. * [Chronicle-Bytes](https://github.com/OpenHFT/Chronicle-Bytes) - Low level memory access wrappers. * [Chronicle-Queue](https://github.com/OpenHFT/Chronicle-Queue) - Micro second messaging that stores everything to disk. * [Chronicle-Map](https://github.com/OpenHFT/Chronicle-Map) - In-memory key-value store designed for low-latency and/or multi-process applications. * [clj-ds](https://github.com/krukow/clj-ds) - [Clojure](/@harrisonqian/awesome/wiki/programming-languages/clojure)'s data structures modified for use outside of [Clojure](/@harrisonqian/awesome/wiki/programming-languages/clojure). * [colfer](https://github.com/pascaldekloe/colfer) - Binary serialization format and class generator. * [commons-math](http://commons.apache.org/proper/commons-math) - Library of lightweight, self-contained mathematics and statistics components. * [CuckooFilter4J](https://github.com/MGunlogson/CuckooFilter4J) - Bloom filter replacement for approximated set-membership queries. * [cyclops](https://github.com/aol/cyclops) - [Integration](/@harrisonqian/awesome/wiki/platforms/integration) modules for [RxJava](/@harrisonqian/awesome/wiki/programming-languages/rxjava), Reactor, FunctionalJava, Guava & Javaslang. * [Eclipse Collections](https://github.com/eclipse/eclipse-collections) - Collections framework for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [externalsortinginjava](https://github.com/lemire/externalsortinginjava) - Sort very large files using multiple cores and an external-memory algorithm. * [failsafe](https://github.com/jhalterman/failsafe) - A lightweight, zero-dependency library for handling failures. * [fasttuple](https://github.com/boundary/fasttuple) - Collections that are laid out adjacently in both on- and off-heap memory. * [fast-uuid](https://github.com/jchambers/fast-uuid) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library for quickly and efficiently parsing and writing UUIDs. * [FlatBuffers](http://google.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/flatbuffers/) - Efficient cross platform serialization library for C++, C#, Go, [Java](/@harrisonqian/awesome/wiki/programming-languages/java), [JavaScript](/@harrisonqian/awesome/wiki/programming-languages/javascript), PHP, and [Python](/@harrisonqian/awesome/wiki/programming-languages/python). * [geohash](https://github.com/davidmoten/geo) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) utility methods for geohashing. * [gs-collections](https://github.com/goldmansachs/gs-collections) - Goldman Sachs collections framework. * [hollow](https://github.com/Netflix/hollow) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library and comprehensive toolset for harnessing small to moderately sized in-memory [datasets](/@harrisonqian/awesome/wiki/miscellaneous/datasets). * [high-scale-lib](https://github.com/boundary/high-scale-lib) - Cliff Click's High Scale Library. * [hppc](https://github.com/carrotsearch/hppc) - High Performance Primitive Collections. * [injector](https://github.com/belliottsmith/injector) - A new Executor for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [java-concurrent-hash-trie-map](https://github.com/romix/java-concurrent-hash-trie-map) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) port of a concurrent trie hash map implementation from [Scala](/@harrisonqian/awesome/wiki/programming-languages/scala) collections. * [java-hll](https://github.com/aggregateknowledge/java-hll) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library for the HyperLogLog algorithm. * [JavaFastPFOR](https://github.com/lemire/JavaFastPFOR) - Library to compress and uncompress arrays of integers very fast. * [java-string-similarity](https://github.com/tdebatty/java-string-similarity) - String similarity and distance measures, including Levenshtein edit distance and sibblings, Jaro-Winkler, Longest Common Subsequence, cosine similarity etc. * [JCTools](http://jctools.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/JCTools/) - Concurrent data structures currently missing from the JDK. * [DSL-JSON](http://github.com/ngs-doo/dsl-json) - High performance [JSON](/@harrisonqian/awesome/wiki/miscellaneous/json) library with advanced compile-time databinding. * [jsoniter](http://jsoniter.com/) - Claims to be the fastest [JSON](/@harrisonqian/awesome/wiki/miscellaneous/json) parser ever (copy of DSL-JSON). * [jOOL](https://github.com/jOOQ/jOOL) - Useful extensions to [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 8 lambdas. * [Koloboke](https://github.com/OpenHFT/Koloboke) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Collections til the last breadcrumb of memory and performance. * [LevelDB](https://github.com/dain/leveldb) - Rewrite (port) of LevelDB in [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [lightweight_trie](https://github.com/bryanduxbury/lightweight_trie) - A very memory-efficient trie (radix tree) implementation. * [lmdbjni](https://github.com/deephacks/lmdbjni) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) API to LMDB (HawtJNI) which is an ultra-fast, ultra-compact key-value embedded data store written in C. * [lmdbjava](https://github.com/lmdbjava/lmdbjava) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) API to LMDB (JNR) which is an ultra-fast, ultra-compact key-value embedded data store written in C. * [low-gc-membuffers](https://github.com/cowtowncoder/low-gc-membuffers) - In-memory circular buffers that use direct ByteBuffers to minimize GC overhead. * [lwjgl3](https://github.com/LWJGL/lwjgl3) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library that enables [cross-platform](/@harrisonqian/awesome/wiki/platforms/cross-platform) access to popular native APIs useful in the development of graphics (OpenGL), audio (OpenAL) and parallel computing (OpenCL) applications. * [MapDB](http://www.mapdb.org) - Collections backed by off-heap or on-disk storage. * [mph-table](https://github.com/indeedeng/mph-table) - Minimal Perfect Hash Tables are an immutable key/value store with efficient space utilization and fast reads. * [mug](https://google.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/mug/) - A small, zero-dep functional util library originating from Google. * [netty-buffers](http://netty.io/wiki/using-as-a-generic-library.html#wiki-h2-1) - Memory buffer pool implementation similar to jemalloc. * [ObjectLayout](http://objectlayout.org) - A layout-optimized [Java](/@harrisonqian/awesome/wiki/programming-languages/java) data structure package. * [ohc](https://github.com/snazy/ohc) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) large off heap cache developed for Apache [Cassandra](/@harrisonqian/awesome/wiki/databases/cassandra) 3.0. * [okio](https://github.com/square/okio) - Modern [Java](/@harrisonqian/awesome/wiki/programming-languages/java) IO library that do clever things to save CPU and memory. * [onyx-java](https://github.com/onyx-platform/onyx-java) - Mirrors the Onyx Platform [core](/@harrisonqian/awesome/wiki/platforms/core) API by providing a [Java](/@harrisonqian/awesome/wiki/programming-languages/java) equivalent for each component of an Onyx workflow. * [parquet](https://parquet.apache.org/) - Columnar storage format that uses the record shredding and assembly algorithm described in the Dremel paper. * [PauselessHashMap](https://github.com/giltene/PauselessHashMap) - A [java](/@harrisonqian/awesome/wiki/programming-languages/java).util.HashMap compatible map that won't stall puts or gets when resizing. * [pcollections](https://github.com/hrldcpr/pcollections) - A Persistent [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Collections Library. * [protobuf](https://developers.google.com/protocol-buffers) - Google's data interchange format. * [Quasar](http://www.paralleluniverse.co/quasar/) - Lightweight threads and actors for the JVM. * [rtree](https://github.com/davidmoten/rtree) - Immutable in-memory R-tree and R*-tree implementations in [Java](/@harrisonqian/awesome/wiki/programming-languages/java) with reactive api. * [RTree2D](https://github.com/Sizmek/rtree2d) - RTree2D is a 2D immutable R-tree with STR (Sort-Tile-Recursive) packing for ultra-fast nearest and intersection queries on plane and spherical surfaces. * [Reactive Streams](http://www.reactive-streams.org/) - Standard for asynchronous stream processing with non-blocking back pressure. * [Reactive Streams Utilities](https://github.com/lightbend/reactive-streams-utils) - Future standard utilities library for Reactive Streams. * [RoaringBitmap](https://github.com/RoaringBitmap/RoaringBitmap) - A better compressed bitset in [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [rollinghashjava](https://github.com/lemire/rollinghashjava) - Rolling hash functions in [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [Reactor](http://projectreactor.io/) - Reactive data applications on the JVM for [Java](/@harrisonqian/awesome/wiki/programming-languages/java), [Groovy](/@harrisonqian/awesome/wiki/programming-languages/groovy), [Clojure](/@harrisonqian/awesome/wiki/programming-languages/clojure) and other. * [RxJava](https://github.com/ReactiveX/RxJava) - Library for composing asynchronous and event-based programs using observable sequences. * [SmoothieMap](https://github.com/OpenHFT/SmoothieMap) - [java](/@harrisonqian/awesome/wiki/programming-languages/java).util.Map impl with worst put latencies more than 100 times smaller than java.util.HashMap. * [Simple Binary Encoding](https://github.com/real-logic/simple-binary-encoding) - High Performance Message Codec. * [splitmap](https://github.com/richardstartin/splitmap/) - A parallel bitmap implementation. * [DataSketches](https://datasketches.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/) - A [Java](/@harrisonqian/awesome/wiki/programming-languages/java) software library of stochastic [streaming](/@harrisonqian/awesome/wiki/big-data/streaming) [algorithms](/@harrisonqian/awesome/wiki/theory/algorithms). * [stormpot](https://github.com/chrisvest/stormpot) - A fast object pool for the JVM. * [stream-lib](https://github.com/addthis/stream-lib) - A [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library for summarizing data in streams for which it is infeasible to store all events. * [streamvbyte](https://github.com/lemire/streamvbyte) - Fast integer compression in C using the StreamVByte codec. * [TraneIO](http://trane.io/) - High-performance implementation of the Future abstraction. * [transducers-java](https://github.com/cognitect-labs/transducers-java) - Composable algorithmic transformations independent from the context of their input and output sources. * [VarInt](https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/util/VarInt.java) - No-deps variable int implementation without deps (by Bazel). * [vavr](http://www.vavr.io/) - Functional Library for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 8+. * [wire](https://github.com/square/wire) - Clean, lightweight protocol buffers for [Android](/@harrisonqian/awesome/wiki/platforms/android) and [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [Zero-Allocation-Hashing](https://github.com/OpenHFT/Zero-Allocation-Hashing) - Hashing any sequences of bytes in [Java](/@harrisonqian/awesome/wiki/programming-languages/java), including all kinds of primitive arrays, buffers, CharSequences and more. ## Metaprogramming *Parsers, interpreters, compilers and source generation targeted for the JVM.* * [Antlr](http://www.antlr.org/) - Parser generator for reading, processing, executing, or translating structured text or binary files. * [auto](https://github.com/google/auto) - A collection of source code generators for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [Apache Calcite](http://calcite.apache.org/docs/) - Dynamic data management framework and SQL parser plugin. * [Checker Framework](http://types.cs.washington.edu/checker-framework/) - Compiler plug-ins that find bugs or verify their absence. * [compile-testing](https://github.com/google/compile-testing) - [Testing](/@harrisonqian/awesome/wiki/testing/testing) tools for javac and annotation processors. * [derive4j](https://github.com/derive4j/derive4j) - Algebraic data types constructors, pattern-matching, morphisms, optics and typeclasses. * [error-prone](https://github.com/google/error-prone) - Catch common [Java](/@harrisonqian/awesome/wiki/programming-languages/java) mistakes as compile-time errors. * [GHCVM](https://github.com/rahulmutt/ghcvm) - A [Haskell](/@harrisonqian/awesome/wiki/programming-languages/haskell) to JVM compiler that supports GHC [Haskell](/@harrisonqian/awesome/wiki/programming-languages/haskell). * [Graal](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/graal/) - New experimental just-in-time compiler for Java that is integrated with the HotSpot virtual machine. * [grappa](https://github.com/fge/grappa) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) fork of Parboiled. Write grammars with no preprocessing phase. * [immutables](http://immutables.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/) - Generate simple, safe and consistent value objects. * [javacc](https://javacc.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/) - Parser generator for use with Java. * [javaparser](https://github.com/javaparser/javaparser) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 1.8 Parser and Abstract Syntax Tree for Java. * [JavaPoet](https://github.com/square/javapoet) - A [Java](/@harrisonqian/awesome/wiki/programming-languages/java) API for generating .java source files. * [jparsec](https://github.com/jparsec/jparsec) - Builds mini parsers in pure [Java](/@harrisonqian/awesome/wiki/programming-languages/java) a la [Haskell](/@harrisonqian/awesome/wiki/programming-languages/haskell) Parsec. * [JSweet](http://www.jsweet.org/) - A transpiler from [Java](/@harrisonqian/awesome/wiki/programming-languages/java) to TypeScript/[JavaScript](/@harrisonqian/awesome/wiki/programming-languages/javascript). * [MPS](https://www.jetbrains.com/mps/) - Design and build extensible DSLs and editors. * [lombok](https://projectlombok.org/) - Reduce the amount of boilerplate code that is commonly written for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) classes. * [parboiled](https://github.com/sirthias/parboiled) - Parsing of arbitrary input text based on parsing expression grammars. * [Sulong](https://github.com/graalvm/sulong) - LLVM IR interpreter written in [Java](/@harrisonqian/awesome/wiki/programming-languages/java) using Truffle and Graal. * [TeaVM](https://github.com/konsoletyper/teavm) - Ahead-of-time translating compiler (transpiler) from [Java](/@harrisonqian/awesome/wiki/programming-languages/java) bytecode to [JavaScript](/@harrisonqian/awesome/wiki/programming-languages/javascript). * [Truffle](https://github.com/graalvm/truffle) - Framework for implementing languages as simple interpreters. * [Xtext](https://eclipse.org/Xtext/) - Framework for development of programming languages and DSLs. ## Native *Interconnecting JVM and native code* * [hawtjni](https://github.com/fusesource/hawtjni) - A JNI code generator based on the JNI generator used in Eclipse SWT. * [Java Grinder](https://github.com/mikeakohn/java_grinder) - Compile [Java](/@harrisonqian/awesome/wiki/programming-languages/java) bytecode to microcontroller assembly. * [j2v8](https://github.com/eclipsesource/j2v8) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) API for Google's V8 [JavaScript](/@harrisonqian/awesome/wiki/programming-languages/javascript) engine. * [JavaCPP](https://github.com/bytedeco/javacpp) - JavaCPP provides efficient access to native C++ inside [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [jnr-ffi](https://github.com/jnr/jnr-ffi) - Load native libraries without writing JNI code by hand. * [jssembly](https://github.com/dvx/jssembly) - Execution of native assembly from [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [NuProcess](https://github.com/brettwooldridge/NuProcess) - A low-overhead, non-blocking I/O, external Process execution implementation for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [Project Panama](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/panama/) - Enriching the connections between the JVM and APIs used by C programmers. ## Network *Tools for network programming, packet capture, monitoring, testing and resiliency.* * [Aeron](https://github.com/real-logic/Aeron) - Efficient reliable UDP unicast, UDP multicast, and IPC message transport. * [armeria](https://github.com/line/armeria) - Asynchronous RPC/API client/server library built on top of [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 8, Netty 4.1, HTTP/2, and Thrift. * [Chronicle-Network](https://github.com/OpenHFT/Chronicle-Network) - A High Performance Network library. * [comcast](https://github.com/tylertreat/comcast) - Simulating shitty network connections. * [gor](https://github.com/buger/gor) - HTTP traffic replay in real-time. * [gRPC](http://www.grpc.io/) - A high performance, open source, general RPC framework that puts mobile and HTTP/2 first. * [jRT](https://github.com/LatencyUtils/jRT) - Measures response time of a [java](/@harrisonqian/awesome/wiki/programming-languages/java) application to socket-based requests. * [JXIO](https://github.com/accelio/JXIO) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) API over AccelIO (C library), a high-performance asynchronous reliable messaging and RPC library optimized for hardware acceleration. * [K3PO](https://github.com/k3po/k3po) - Create arbitrary network traffic and behavior to certify whether a network endpoint behaves correctly. * [muxy](https://github.com/mefellows/muxy) - Simulating real-world distributed system failures. * [Netty](http://netty.io/) - Async event-driven network library for high performance protocol servers & clients. * [okhttp](https://github.com/square/okhttp) - An HTTP+HTTP/2 client for [Android](/@harrisonqian/awesome/wiki/platforms/android) and [Java](/@harrisonqian/awesome/wiki/programming-languages/java) applications. * [one-nio](https://github.com/odnoklassniki/one-nio) - library for building high performance [Java](/@harrisonqian/awesome/wiki/programming-languages/java) servers. * [proteus-java](https://github.com/netifi-proteus/proteus-java) - Proteus [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Client based on RSocket. * [reactive-grpc](https://github.com/salesforce/reactive-grpc) - Reactive gRPC is a suite of libraries for using gRPC with Reactive Streams programming libraries. * [RSocket](http://rsocket.io/) - RSocket is a binary protocol for use on byte stream transports such as TCP, WebSockets, and Aeron. * [SimianArmy](https://github.com/Netflix/SimianArmy) - Resiliency tool that helps ensure that your applications can tolerate random instance failures. * [pcap4j](https://github.com/kaitoy/pcap4j) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) library for capturing, crafting, and sending packets using libpcap. * [pig](https://github.com/rafael-santiago/pig) - A [Linux](/@harrisonqian/awesome/wiki/platforms/linux) packet crafting tool. * [tcpdump](http://www.tcpdump.org/) - Packet analyzer for network traffic capture. * [tcpflow](https://github.com/simsong/tcpflow) - Captures TCP connections flows in a way that is convenient for protocol analysis and debugging. * [tcpreplay](https://github.com/appneta/tcpreplay) - Pcap editing and replay tools. ## Nix tools *Useful *nix tools when profiling the JVM and interaction with the host environment* * [atoptool](http://www.atoptool.nl/) - Logging of system and process activity for long-term analysis, highlighting overloaded system. * [bcc](https://github.com/iovisor/bcc) - Tools for BPF-based [Linux](/@harrisonqian/awesome/wiki/platforms/linux) IO analysis, networking, monitoring, and more. * [Flame Graphs](http://www.brendangregg.com/flamegraphs.html) - Visualization of profiled software, allowing the most frequent code-paths to be identified quickly and accurately. * [ioping](https://github.com/koct9i/ioping) - Simple disk I/0 latency measuring tool. * [javap](http://docs.oracle.com/javase/8/docs/technotes/tools/unix/javap.html) - Disassembles class files into code that reflects the [java](/@harrisonqian/awesome/wiki/programming-languages/java) bytecode. * [jhat](http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jhat.html) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Heap Analysis Tool * [jhsdb](https://docs.oracle.com/javase/9/tools/jhsdb.htm) - Launch a postmortem debugger to analyze the content of a [core](/@harrisonqian/awesome/wiki/platforms/core)-dump from a crashed JVM. * [jinfo](http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jinfo.html) - Prints configuration information for a given process. * [jstack](http://docs.oracle.com/javase/8/docs/technotes/tools/unix/jstack.html) - Prints stack traces of threads for a given [Java](/@harrisonqian/awesome/wiki/programming-languages/java) process. * [jstat](https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jstat.html) - Monitors GC and compiler statistics in the JVM. * [hwloc](http://linux.die.net/man/7/hwloc) - Reports the structure of the processor, number of cores, hyperthreads and cache size. * [likwid](https://github.com/RRZE-HPC/likwid) - Read hardware performance counters on Intel and AMD processors. * [numactl](http://linux.die.net/man/8/numactl) - Control NUMA policy for processes or shared memory. * [oprofile](http://oprofile.sourceforge.net/news/) - System-wide hardware performance monitoring with easy-to-use interface at low overhead. * [perf](https://perf.wiki.kernel.org/index.php/Main_Page) - [Linux](/@harrisonqian/awesome/wiki/platforms/linux) profiling with performance counters. * [perf-tools](https://github.com/brendangregg/perf-tools) - Performance analysis tools based on [Linux](/@harrisonqian/awesome/wiki/platforms/linux) perf_events (aka perf) and ftrace. * [sysdig](http://www.sysdig.org/) - Capture system state and activity from a running [Linux](/@harrisonqian/awesome/wiki/platforms/linux) instance, then save, filter and analyze. * [sysstat](http://sebastien.godard.pagesperso-orange.fr) - Performance monitoring tools for [Linux](/@harrisonqian/awesome/wiki/platforms/linux). * [taskset/process-affinity](https://www.glennklockwood.com/hpc-howtos/process-affinity.html) - Retrieve or set a processes’s CPU affinity. * [tiptop](http://tiptop.gforge.inria.fr/) - Like top but also shows instructions per cycle (IPC). ## Profilers *Tools that provide profiling and tracing information to aid program optimization* * [allocation-instrumenter](https://github.com/google/allocation-instrumenter) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) agent that rewrites bytecode to instrument allocation sites. * [aprof](https://github.com/Devexperts/aprof) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) memory allocation profiler. * [async-profiler](https://github.com/jvm-profiling-tools/async-profiler) - Sampling CPU profiler for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) featuring AsyncGetCallTrace + perf_events. * [BTrace](https://github.com/jbachorik/btrace) - a safe, dynamic tracing tool for the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) platform. * [Byteman](http://byteman.jboss.org/) - tracing, monitoring and [testing](/@harrisonqian/awesome/wiki/testing/testing) tool for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) * [bytestacks](https://github.com/cl4es/bytestacks) - Turn JVM bytecode execution into [flame](/@harrisonqian/awesome/wiki/gaming/flame) graphs. * [Chronon](http://chrononsystems.com) - Record your entire [java](/@harrisonqian/awesome/wiki/programming-languages/java) program. Replay on any machine. * [GCeasy](http://gceasy.io/) - [Machine learning](/@harrisonqian/awesome/wiki/computer-science/machine-learning) guided Garbage collection log analysis tool. Auto-detect problems in the JVM GC logs and recommend solutions to it. * [GCViewer](https://github.com/chewiebug/GCViewer) - GCViewer is a tool that visualizes verbose GC output. * [grav](https://github.com/epickrram/grav) - A collection of tools to help visualise process execution. * [hawkshaw](https://github.com/jClarity/hawkshaw) - Tools for tracking down memory / JVM problems & generating predictable-as-possible VM behaviour. * [HdrHistogram](http://hdrhistogram.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/HdrHistogram/) - A Histogram that supports recording and analyzing sampled data value counts. * [hdrhistogram-metrics-reservoir](https://bitbucket.org/marshallpierce/hdrhistogram-metrics-reservoir) - A Metrics Reservoir implementation backed by HdrHistogram. * [HdrLogProcessing](https://github.com/nitsanw/HdrLogProcessing) - Utilities for HDR Histogram logs manipulation. * [heapster](https://github.com/mariusae/heapster) - Production heap profiling for the JVM. * [honest-profiler](https://github.com/RichardWarburton/honest-profiler) - Sampling JVM profiler without the safepoint sample bias. * [jamm](https://github.com/jbellis/jamm) - Measure actual object memory use including JVM overhead. * [Java Flight Recorder (JFR)](http://www.oracle.com/technetwork/java/javaseproducts/mission-control/java-mission-control-1998576.html) - Tool for collecting diagnostic and profiling data about a running [Java](/@harrisonqian/awesome/wiki/programming-languages/java) application with almost no performance overhead. * [java-sizeof](https://github.com/dweiss/java-sizeof) - Memory consumption estimator for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [jcstress](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/code-tools/jcstress/) - Experimental harness and tests to aid the research in the correctness of concurrency support in the JVM, class libraries, and hardware. * [jfr-[flame](/@harrisonqian/awesome/wiki/gaming/flame)-graph](https://github.com/chrishantha/jfr-flame-graph) - Converting JFR Method Profiling Samples to FlameGraph compatible format. * [jfr-report-tool](https://github.com/lhotari/jfr-report-tool) - Tool for creating reports from [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Flight Recorder dumps. * [jitwatch](https://github.com/AdoptOpenJDK/jitwatch) - Log analyser / visualiser for [Java](/@harrisonqian/awesome/wiki/programming-languages/java) HotSpot JIT compiler. * [jitwatch-intellij](https://github.com/yole/jitwatch-intellij) - JITWatch plugin for IntelliJ IDEA. * [jHiccup](http://www.azul.com/jhiccup/) - jHiccup is an open source tool designed to measure the pauses and stalls associated with an application’s underlying [Java](/@harrisonqian/awesome/wiki/programming-languages/java) runtime platform. * [jmh](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/code-tools/jmh/) - Micro benchmarks written in Java and other languages targetting the JVM. * [jmh-compare-gui](https://github.com/akarnokd/jmh-compare-gui) - GUI for comparing JMH results. * [JOL](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/code-tools/jol/) - Analyze actual object layout schemes, footprint, and references in JVMs. * [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html) - Helps resolve performance bottlenecks, pin down memory leaks and understand threading issues. * [JVMTI](https://docs.oracle.com/javase/8/docs/technotes/guides/jvmti/) - Provide a native API to inspect the state and to control the execution of applications running in the JVM. * [jvmtop](https://github.com/patric-r/jvmtop) - Lightweight console application to monitor running jvms on a machine in top-like manner. * [jvm-profiler](https://github.com/uber-common/jvm-profiler) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Agent to collect various metrics and stacktraces for [Hadoop](/@harrisonqian/awesome/wiki/big-data/hadoop)/Spark JVM processes in a distributed way. * [MAT](https://eclipse.org/mat/) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) heap analyzer that help find memory leaks and reduce memory consumption. * [leakcanary](https://github.com/square/leakcanary) - A memory leak detection library for [Android](/@harrisonqian/awesome/wiki/platforms/android) and [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [metrics](http://metrics.[dropwizard](/@harrisonqian/awesome/wiki/back-end-development/dropwizard).io/) - Measure the behavior of critical components in production environment. * [micrometer](https://github.com/micrometer-metrics/micrometer) - An application metrics facade for the most popular monitoring tools. * [osquery](https://osquery.io/) - osquery is an instrumentation framework that expose the operating system as a high-performance relational [database](/@harrisonqian/awesome/wiki/databases/database). * [Overseer](http://www.peternier.com/projects/overseer/overseer.php) - Low-Level Hardware Monitoring and Management for [Java](/@harrisonqian/awesome/wiki/programming-languages/java). * [OpenTracing](http://opentracing.io/) - A vendor-neutral open standard for distributed tracing. * [perf-map-agent](https://github.com/jrudolph/perf-map-agent) - Generate method mappings to use with the [linux](/@harrisonqian/awesome/wiki/platforms/linux) `perf` tool. * [perfj](https://github.com/coderplay/perfj) - [Linux](/@harrisonqian/awesome/wiki/platforms/linux) perf for [java](/@harrisonqian/awesome/wiki/programming-languages/java) programs. * [polarbear](https://github.com/Cue/polarbear) - A tool to help diagnose OutOfMemoryError conditions. * [Riemann JVM Profiler](https://github.com/riemann/riemann-jvm-profiler) - JVM agent which sends function-level profiler telemetry to a Riemann server for analysis, visualization, and storage. * [statsd-jvm-profiler](https://github.com/etsy/statsd-jvm-profiler) - JVM agent profiler that sends profiling data to StatsD. * [Swiss [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Knife](https://github.com/aragozin/jvm-tools) - Small set of tools for JVM troublshooting, monitoring and profiling. * [Takipi](https://www.takipi.com/) - Tells you when and why code breaks in production. * [Tracer](https://github.com/zalando/tracer) - Manages custom trace identifiers and carries them through distributed systems. * [YourKit](https://www.yourkit.com/) - Fully featured, easy to use, low overhead profiler. * [Zipkin](https://github.com/openzipkin/zipkin) - A distributed tracing system gather timing data for disparate services developed by Twitter. ## Runtimes *Tools for managing jvm runtime processes* * [Capsule](https://github.com/puniverse/capsule) - Dead-Simple Packaging and Deployment for JVM [Apps](/@harrisonqian/awesome/wiki/platforms/apps). * [CRaSH](http://www.crashub.org/) - The [shell](/@harrisonqian/awesome/wiki/development-environment/shell) for the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Platform. * [Drip](https://github.com/ninjudd/drip) - Fast JVM launching without the hassle of persistent JVMs. * [HotswapAgent](https://github.com/HotswapProjects/HotswapAgent) - Redefine classes at runtime and skip the redeploy process. * [jvmkill](https://github.com/airlift/jvmkill) - Agent that forcibly terminates the JVM when it is unable to allocate memory or create a thread. * [Nailgun](http://martiansoftware.com/nailgun/) - Nailgun is a client, protocol, and server for running [Java](/@harrisonqian/awesome/wiki/programming-languages/java) programs from the command line without incurring the JVM startup overhead. ## Virtual Machines *Virtual machines that implement the JVM specification or parts of it.* * [Avian](https://github.com/ReadyTalk/avian) - Lightweight highly portable JVM with an option for AOT compilation. * [Dalvik](https://source.[android](/@harrisonqian/awesome/wiki/platforms/android).com/devices/tech/dalvik/) - [Android](/@harrisonqian/awesome/wiki/platforms/android) runtime (ART) is the managed runtime used by applications and some system services on Android. * [DCEVM](http://dcevm.[github](/@harrisonqian/awesome/wiki/development-environment/github).io) - Modification of [Java](/@harrisonqian/awesome/wiki/programming-languages/java) HotSwap VM with unlimited support for reloading classes at runtime. * [HotSpot](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/groups/hotspot/) - HotSpot virtual machine maintained and distributed by Oracle Corporation. * [IBM J9](http://www.ibm.com/developerworks/java/jdk/) - JVM developed by IBM. * [Eclipse OpenJ9](https://github.com/eclipse/openj9) - Eclipse OpenJ9. * [J2ObjC](https://github.com/google/j2objc) - Translator from [Java](/@harrisonqian/awesome/wiki/programming-languages/java) source to Objective-C code. Keeps shared code between iOS native [apps](/@harrisonqian/awesome/wiki/platforms/apps) and [Android](/@harrisonqian/awesome/wiki/platforms/android) native apps. * [jvm.go](https://github.com/zxh0/jvm.go) - A JVM written in Go. * [ParparVM](https://github.com/codenameone/CodenameOne/tree/master/vm) - An Open Source [Java](/@harrisonqian/awesome/wiki/programming-languages/java) bytecode to C translator for iOS native development. Designed as a part of the [Codename One](https://www.codenameone.com/) WORA for mobile project. * [MobiDevelop's RoboVM Fork](https://github.com/MobiVM/robovm) - Ahead of time compiler for JVM bytecode targeting iOS, Mac OSX and [Linux](/@harrisonqian/awesome/wiki/platforms/linux). * [Zing](https://www.azul.com/products/zing/) - The only JVM that eliminates [Java](/@harrisonqian/awesome/wiki/programming-languages/java) garbage collection pauses for large heap sizes. * [Zulu](https://www.azul.com/products/zulu/) - The only certified multi-platform build of OpenJDK: Free, 100% open source [Java](/@harrisonqian/awesome/wiki/programming-languages/java). # Resources ## Documentation *Documentation related to JVM* * [TCP Tracepoints](http://www.brendangregg.com/blog/2018-03-22/tcp-tracepoints.html) [Linux](/@harrisonqian/awesome/wiki/platforms/linux) bcc/BPF using tcplife by Brendan Gregg * [Linux tracing workshop](https://github.com/goldshtn/linux-tracing-workshop) - JVM monitoring with BPF, examples and hands-on labs for [Linux](/@harrisonqian/awesome/wiki/platforms/linux) tracing tools workshops. * [JVM Anatomy Park](https://shipilev.net/jvm-anatomy-park/) - mini-post series where every post goes deep for only a single topic by Aleksey Shipilёv. * [Coordinated Omission problem](https://groups.google.com/forum/#!msg/mechanical-sympathy/icNZJejUHfE/BfDekfBEs_sJ) - Discussion on Mechanical Sympathy. * [False sharing](http://mechanical-sympathy.blogspot.se/2011/07/false-sharing.html) - Threads impact the performance of each other while modifying independent variables sharing the same cache line. Martin Thompson. * [The JVM specification](https://docs.oracle.com/javase/specs/jvms/se8/jvms8.pdf) - The [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Virtual Machine Specification Java SE 8 Edition. * [The [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Memory Model](http://www.cs.umd.edu/~pugh/java/memoryModel/) - Starting point for discussions of and information concerning the Java Memory Model. * [The JSR-133 Cookbook for Compiler Writers](http://gee.cs.oswego.edu/dl/jmm/cookbook.html) - Unofficial guide to implementing the new [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Memory Model (JMM) specified by JSR-133. * [Garbage Collection Tuning Guide](http://docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/) - HotSpot Virtual Machine Garbage Collection Tuning Guide. * [Safepoints](http://psy-lob-saw.blogspot.se/2014/03/where-is-my-safepoint.html) - Where is my safepoint? Nitsan Wakart. * [Topics in High-Performance Messaging](https://www.informatica.com/downloads/1568_high_perf_messaging_wp/Topics-in-High-Performance-Messaging.htm) - Design decisions, experience and constraints explained in high performance messaging systems. * [Top 10 Performance Mistakes](http://www.infoq.com/articles/top-10-performance-mistakes) - Digest of the top 10 performance related mistakes Martin Thompson has seen in production. * [The USE method](http://www.brendangregg.com/usemethod.html) - The Utilization Saturation and Errors (USE) Method is a methodology for analyzing the performance of any system. Brendan Gregg. * [An introduction to distributed systems](https://github.com/aphyr/distsys-class) - Kyle Kingsbury (author of Jepsen). * [Using JDK 9 Memory Order Modes](http://gee.cs.oswego.edu/dl/html/j9mm.html) - For expert programmers familiar with [Java](/@harrisonqian/awesome/wiki/programming-languages/java) concurrency, but unfamiliar with the memory order modes available in JDK 9 provided by VarHandles. * [CPU Utilization is Wrong](http://www.brendangregg.com/blog/2017-05-09/cpu-utilization-is-wrong.html) - Measure instructions per cycle (IPC) for CPU utilization. Brendan Gregg. * [Linux Load Averages: Solving the Mystery](http://www.brendangregg.com/blog/2017-08-08/linux-load-averages.html) - Brendan Gregg. * [What every programmer should know about solid-state drives](http://codecapsule.com/2014/02/12/coding-for-ssds-part-6-a-summary-what-every-programmer-should-know-about-solid-state-drives/) - Emmanuel Goossaert. * [Quick [Tips](/@harrisonqian/awesome/wiki/programming-languages/tips) for Fast Code on the JVM](https://gist.[github](/@harrisonqian/awesome/wiki/development-environment/github).com/djspiewak/464c11307cabc80171c90397d4ec34ef) - Daniel Spiewak. ## Communities *Active discussions.* * [concurrency-interest](http://altair.cs.oswego.edu/mailman/listinfo/concurrency-interest) - Discussion list for JSR-166. * [hotspot-compiler-dev](http://mail.openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/mailman/listinfo/hotspot-compiler-dev) - Technical discussion about the development of the HotSpot bytecode compilers. * [hotspot-dev](http://mail.openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/mailman/listinfo/hotspot-dev) - HotSpot development mailing list. * [hotspot-gc-dev](http://mail.openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/mailman/listinfo/hotspot-gc-dev) - Technical discussion about the development of the HotSpot garbage collectors. * [mechanical-sympathy](https://groups.google.com/forum/#!forum/mechanical-sympathy) - Discussing how to code sympathetically to and measure the underlying stack/platform so good performance can be extracted. * [Performance [Java](/@harrisonqian/awesome/wiki/programming-languages/java) User's Group](https://plus.google.com/u/0/communities/107178245817384004088/) - For expert Java *developers* who want to push their systems to the next level * [Virtual Machine Meetup 2017](http://vmmeetup.[github](/@harrisonqian/awesome/wiki/development-environment/github).io/2017/) - Venue for discussing the latest research and developments in the area of managed language execution. ## Media *Videos, podcasts and other media related to JVMs* * [FOSDEM 2018](https://fosdem.org/2018/schedule/track/free_java/) - FOSDEM 2018 Free [Java](/@harrisonqian/awesome/wiki/programming-languages/java) devroom. * [JFokus 2018](https://www.youtube.com/playlist?list=PL2ekzZZrxVUkhrcMKuPMbiKoghc777plr) - The GC edition. Shenandoah, ZGC, Zing, Fibers, Falcon etc. * [G1 Garbage Collector in [Java](/@harrisonqian/awesome/wiki/programming-languages/java) 8/9](http://nighthacking.com/g1-gc-with-kirk-pepperdine/) - Kirk Pepperdine. * [Extreme Profiling: Digging Into Hotspots](https://youtu.be/7PkkxDaFDj8?list=PLKuh52zVrL6l6jzeSwNce77yLdfKmHAgD) - Nitsan Wakart. * [Java vs. C Performance](http://www.infoq.com/presentations/java-vs-c-performance) - Cliff Click. * [Why JNI is slow?](https://www.youtube.com/watch?v=LoyBTqkSkZk) - Cliff Click * [A Crash Course in Modern Hardware](https://www.youtube.com/watch?v=OFgxAFdxYAQ) - Cliff Click * [Java Profiling from the Ground Up](https://www.youtube.com/watch?v=_6vJyciXkwo) - Nitsan Wakart. * [The Illusion of Execution](https://www.youtube.com/watch?v=3g9R-RVIkOE) - Nitsan Wakart. * [Mythbusting Modern Hardware to Gain 'Mechanical Sympathy'](https://www.youtube.com/watch?v=MC1EKLQ2Wmg) - Martin Thompson. * [Designing for Performance](https://www.youtube.com/watch?v=fDGWWpHlzvw) - Martin Thompson. * [How NOT to Measure Latency](https://www.youtube.com/watch?v=lJ8ydIuPFeU) - Gil Tene. * [JVM Language Summit 2015](http://openjdk.[java](/@harrisonqian/awesome/wiki/programming-languages/java).net/projects/mlvm/jvmlangsummit/) - JVM Language Summit 2015. * [JVM Language Summit 2016](https://www.youtube.com/playlist?list=PLX8CzqL3ArzUY6rQAQTwI_jKvqJxrRrP_) - JVM Language Summit 2016. * [JVM Language Summit 2017](https://www.youtube.com/playlist?list=PLX8CzqL3ArzXJ2EGftrmz4SzS6NRr6p2n) - JVM Language Summit 2017. * [Bits of advice for VM writers](https://www.youtube.com/watch?v=vzzABBxo44g) - Cliff Click. * [Understanding [Java](/@harrisonqian/awesome/wiki/programming-languages/java) garbage collection ...](https://www.youtube.com/watch?v=_e5hujoTkgY) - Gil Tene. * [Faster Object Arrays](https://www.youtube.com/watch?v=bZuPTCaciLU) - Gil Tene at GOTO Conferences. * [Java Memory Model Pragmatics](https://www.youtube.com/watch?v=TxqsKzxyySo) - Aleksey Shipilev. * [With GC Solved, What Else Makes a JVM Pause?](https://www.youtube.com/watch?v=Y39kllzX1P8) - John Cuthbertson. * [JVM Mechanics](https://vimeo.com/120533011) - Douglas Hawkins. * [Give me 15 minutes and I'll change your view of [Linux](/@harrisonqian/awesome/wiki/platforms/linux) tracing](https://www.youtube.com/watch?v=GsMs3n8CB6g) - Brendan Gregg. * [Kernel Recipes 2017: Performance Analysis with BPF](https://www.slideshare.net/brendangregg/kernel-recipes-2017-performance-analysis-with-bpf) - Brendan Gregg. * [Shenandoah deep talk](https://shipilev.net/talks/vmm-Sep2017-shenandoah.pdf) - Aleksey Shipilëv slightly-deeper-than-usual Shenandoah talk from Virtual Machine Meetup 2017. * [Shenandoah: The Garbage Collector That Could](https://www.youtube.com/watch?v=VCeHkcwfF9Q) - Aleksey Shipilev - Devoxx 2017/11 * [Analyzing and Debugging the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) HotSpot VM at the OS Level](https://www.youtube.com/watch?v=k7IX_diKCEo) - Volker Simonis. * [Cliff Click podcast 2017/09/16](http://www.cliffc.org/blog/2017/09/16/programming-and-performance-intro/) - Programming and Performance Intro. * [Cliff Click podcast 2017/09/16](http://www.cliffc.org/blog/2017/09/16/of-bugs-and-coding-styles/) - Bugs and Coding Styles. * [Cliff Click podcast 2017/09/18](http://www.cliffc.org/blog/2017/09/18/java-vs-cc-the-podcast/) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) vs C/C++. * [Cliff Click podcast 2017/09/21](http://www.cliffc.org/blog/2017/09/21/debugging-data-races/) - Debugging Data Races. * [Cliff Click podcast 2017/09/24](http://www.cliffc.org/blog/2017/09/24/fast-bytecodes-for-funny-languages/) - Fast Bytecodes for Funny Languages. * [Cliff Click podcast 2017/09/28](http://www.cliffc.org/blog/2017/09/28/struct-of-arrays-vs-array-of-structs/) - Struct of Arrays vs Array of Structs. * [Cliff Click podcast 2017/10/04](http://www.cliffc.org/blog/2017/10/04/the-3-hardest-problems-in-programming/) - The 3 Hardest Problems in Programming. * [Cliff Click podcast 2017/11/05](http://cliffc.org/blog/2017/11/05/modern-hardware-performance-cache-lines/) - Modern Hardware Performance and Cache Lines. * [Cliff Click podcast 2017/11/09](http://cliffc.org/blog/2017/11/09/queuing-in-practice/) - Queuing In Practice. * [Which technique do programming language parsers and interpreters use?](https://www.quora.com/Which-technique-do-programming-language-parsers-and-interpreters-use/answer/Cliff-Click-1?srid=dZAx) - Cliff Click. * [Everything about Stack Traces and Heap Dumps](https://vimeo.com/233820012) - Andrei Pangin. * [Fast and safe production monitoring of JVM with BPF tools](http://s.sashag.net/velny17-jvm) - Sasha Goldshtein. * [The Future of the [Linux](/@harrisonqian/awesome/wiki/platforms/linux) Page Cache](https://www.youtube.com/watch?time_continue=1&v=xxWaa-lPR-8) - Matthew Wilcox. ## People *People that share hard-earned, often undocumented, knowledge and data of the inner workings of the JVM* * [Aleksey Shipilëv](http://shipilev.net/) - Developing Oracle/Open JDK/Hotspot and other [Java](/@harrisonqian/awesome/wiki/programming-languages/java)-related technologies. * [Andrey Breslav](https://twitter.com/abreslav) - Lead Language Designer of [Kotlin](/@harrisonqian/awesome/wiki/programming-languages/kotlin) @ JetBrains. * [Brian Goetz](https://twitter.com/BrianGoetz) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Language Architect at Oracle. * [Ben Christensen](https://twitter.com/benjchristensen) - Facebook, Netflix, Apple engineering. * [Brendan Gregg](http://www.brendangregg.com) - Cloud performance, kernel engineer, speaker, author. * [Charles Nutter](https://twitter.com/headius) - JRuby guy. * [Claes Redestad](https://twitter.com/cl4es) - Working with OpenJDK stuff @ Oracle. * [Cliff Click](http://www.cliffc.org/blog/) - Creator of the HotSpot Server Compiler. * [Dave Dice](https://blogs.oracle.com/dave/) - Senior research scientist in the Scalable Synchronization Research Group within Oracle. * [Dávid Karnok](http://akarnokd.blogspot.se/) - [RxJava](/@harrisonqian/awesome/wiki/programming-languages/rxjava) committer that blogs about advanced [RxJava](/@harrisonqian/awesome/wiki/programming-languages/rxjava). * [Doug Lea](http://g.oswego.edu/) - Author of the [Java](/@harrisonqian/awesome/wiki/programming-languages/java) memory model. * [Gil Tene](https://twitter.com/giltene) - Azul Systems. * [Heinz Kabutz](https://twitter.com/heinzkabutz) - Author of 250+ [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Specialists' Newsletters. * [Ivan Krylov](https://twitter.com/JohnWings) - JVM expert. * [Jake Wharton](https://twitter.com/JakeWharton) - Square, Google, open source hacker. * [John Rose](https://blogs.oracle.com/jrose/) - HotSpot developer. * [Jonas Bonér](https://twitter.com/jboner) - Founder & CTO of Lightbend. * [Lukas Eder](https://twitter.com/lukaseder) - Blogger. Author of JOOQ. * [Marcus Lagergren](https://twitter.com/lagergren) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) language team alumnus. * [Mark Reinhold](https://twitter.com/mreinhold) - Chief Architect, [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Platform Group, Oracle. * [Martin Thompson](http://mechanical-sympathy.blogspot.se/) - Pasty faced performance gangster. * [Martijn Verburg](https://twitter.com/karianna) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Champion. * [Kirk Pepperdine](https://twitter.com/javaperftuning) - Working in high performance and distributed computing for nearly 20 years. * [Nitsan Wakart](http://psy-lob-saw.blogspot.se/2014/03/where-is-my-safepoint.html) - Azul Systems. * [Norman Maurer](https://twitter.com/normanmaurer) - Netty developer. * [Paul Phillips](https://twitter.com/contrarivariant) - Forever undisputed SLOC [Scala](/@harrisonqian/awesome/wiki/programming-languages/scala) compiler dev. * [Per Liden](https://twitter.com/perliden) - [Hacking](/@harrisonqian/awesome/wiki/security/hacking) on the HotSpot JVM at Oracle. * [Peter Lawrey](https://twitter.com/PeterLawrey) - Innovative developer of high performance [Java](/@harrisonqian/awesome/wiki/programming-languages/java) systems for competitive advantage. * [Rafael Winterhalter](https://twitter.com/rafaelcodes) - Author of ByteBuddy. * [Richard Warburton](https://twitter.com/RichardWarburto) - Developer, Speaker, Author. * [Richard Startin](http://richardstartin.uk/) - Performance Analyst, developer, blogger. * [Ron Pressler](https://twitter.com/pressron) - Parallel Universe. Leading Fibers and Continuations for the JVM. * [Stephen Colebourne](https://twitter.com/jodastephen) - [Java](/@harrisonqian/awesome/wiki/programming-languages/java) Champion. Occasional blogger and speaker. Best known for Joda projects and JSR-310. * [Todd L. Montgomery](https://twitter.com/toddlmontgomery) - Ex-CTO, Ex-NASA researcher, network geek, messaging middleware designer. * [Stéphane Maldini](https://twitter.com/smaldini) - Project Reactor Lead @Pivotal. * [Stuart Marks](https://twitter.com/stuartmarks) - Doctor Deprecator. Java/JDK/OpenJDK developer * [Vladimir Ivanov](https://twitter.com/iwan0www) - [hacking](/@harrisonqian/awesome/wiki/security/hacking) HotSpot JVM @ Oracle. * [Viktor Klang](https://twitter.com/viktorklang) - Deputy CTO at Typesafe Inc. # Contributing Contributions are very welcome! Please have a look at [contributing.md](https://github.com/deephacks/awesome-jvm/blob/master/contributing.md) for guidelines.