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HHVM information


HHVM
Developer(s)Meta Platforms
Initial releaseDecember 9, 2011; 10 years ago (2011-12-09)[1]
Stable release4.158.0 (20 April 2022; 7 months ago (2022-04-20)) [±][2]
Repository
  • github.com/facebook/hhvm Edit this at Wikidata
Written inPHP, C++,[3] OCaml[4][a] and Rust[5]
LicensePHP License and Zend License[6]
Websitehhvm.com Edit this at Wikidata

HipHop Virtual Machine (HHVM) is an open-source virtual machine based on just-in-time (JIT) compilation that serves as an execution engine for the Hack programming language and used to support PHP execution before the release of HHVM version 4.[7] By using the principle of JIT compilation, Hack code is first transformed into intermediate HipHop bytecode (HHBC), which is then dynamically translated into x86-64 machine code, optimized, and natively executed.[8][9] This contrasts with PHP's usual interpreted execution, in which the Zend Engine transforms PHP source code into opcodes that serve as a form of bytecode, and executes the opcodes directly on the Zend Engine's virtual CPU.[10]

HHVM is developed by Meta, with the project's source code hosted on GitHub;[11] it is licensed under the terms of the PHP License and Zend License.[1][6]

  1. ^ a b Jason Evans (December 9, 2011). "The HipHop Virtual Machine". Meta Platforms. Retrieved August 2, 2014.
  2. ^ "Releases · facebook/hhvm". Facebook. April 20, 2022. Retrieved May 1, 2022.
  3. ^ "Building and installing HHVM on CentOS 7.x". github.com. Meta Platforms. May 26, 2015. Retrieved June 12, 2015.
  4. ^ "Building the Hack typechecker". github.com. Meta. September 10, 2014. Retrieved June 12, 2015.
  5. ^ "Facebook's HHVM Begins Seeing Rust Rewrite - Phoronix". Retrieved August 29, 2019.
  6. ^ a b "facebook/hhvm: License". github.com. Facebook, Inc. Retrieved August 2, 2014.
  7. ^ "HHVM 4.0.0".
  8. ^ Ottoni, Guilherme (June 20, 2018). "HHVM JIT: A Profile-Guided, Region-Based Compiler for PHP and Hack". Proceedings of the 39th ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI). ACM. pp. 151–165.
  9. ^ "facebook/hhvm". github.com. Meta Platforms. Retrieved August 2, 2014.
  10. ^ Kaushik Pal (April 28, 2014). "PHP and Zend Engine Internals". phpbuilder.com. Archived from the original on September 15, 2014. Retrieved September 23, 2014.
  11. ^ HHVM source code on GitHub


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