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HHVM, or HipHop Virtual Machine, is an open-source virtual machine specifically designed for executing programs written in Hack, a programming language. Developed by Meta, formerly known as Facebook^[1], HHVM was conceived as a successor to HipHop for PHP (HPHPc). It operates on the principle of Just-In-Time (JIT) compilation, a technique used for efficient code execution. HHVM introduced an intermediate bytecode format known as HHBC, simplifying the processes of development and deployment. It is recognized for its exceptional performance capabilities, including high web server throughput, reduced latency, and dynamic optimization of x86-64 machine code. Further, it’s linked to other technologies like LLVM, Parrot virtual machine, and Phalanger. The source code of HHVM is available on GitHub^[2], and it’s licensed under PHP and Zend Licenses.

Définitions des termes

1. ↑ Facebook ( Facebook ) Facebook, aujourd'hui connu sous le nom de Meta Platforms, est une grande société Internet qui a débuté comme plateforme de réseau social. Fondé par Mark Zuckerberg en 2004, Facebook s'est rapidement étendu de Harvard à d'autres universités, puis au grand public, devenant ainsi un phénomène mondial. Il est connu pour son interface conviviale et ses diverses fonctionnalités telles que les groupes, la plateforme pour développeurs et Facebook Dating. Bien que critiqué pour des questions telles que les atteintes à la vie privée et la diffusion de fausses nouvelles, Facebook est resté un acteur dominant du monde en ligne. L'entreprise a fait des progrès considérables dans le domaine de la technologie, notamment en développant son système unique de stockage de données, en utilisant PHP pour sa plateforme et en lançant le langage de programmation Hack. Ces dernières années, l'entreprise s'est tournée vers le métavers, un espace de réalité virtuelle où les utilisateurs peuvent interagir avec un environnement généré par ordinateur.

2. ↑ GitHub ( GitHub ) GitHub is a platform designed specifically for developers. It provides a space for creating, storing, managing, and sharing code. The platform is built on Git software, which enables version control, access control, and bug tracking, among other features. Being a Microsoft subsidiary since 2018, GitHub has made a name for itself as a host for open source software projects. As of January 2023, it boasts of a community of over 100 million developers and houses more than 420 million repositories. GitHub was brought to life in 2008 by its four founders. It started as a flat organization, promoting autonomy, flexibility, and collaboration among its employees. Beyond version control, GitHub also offers services like task management, continuous integration, and support for project wikis. It's not just a platform; it's a comprehensive toolkit for software development.

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Glossaire

HHVM (Wikipedia)

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. 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. 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.

HHVM

Developer(s)	Métaplateformes
Initial release	December 9, 2011; 12 years ago (2011-12-09)

Stable release	3.15.0 / 28 September 2016; 7 years ago (28 September 2016)

Repository	github.com/facebook/hhvm
Written in	PHP, C++, OCaml et Rust
License	PHP License et Zend License
Site web	hhvm.com

HHVM is developed by Méta, with the project's source code hosted on GitHub; it is licensed under the terms of the PHP License et Zend License.

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