facebook/hhvm

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

18655 stars · 3070 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

HHVM is an open-source virtual machine with a just-in-time (JIT) compiler for executing programs written in the Hack programming language. It includes a built-in Proxygen webserver, FastCGI support, and the Hack typechecker, and is developed by Facebook/Meta.

Use cases

• run Hack programs from the command line
• host a website written in Hack behind Proxygen or nginx with FastCGI
• typecheck Hack code with the bundled Hack typechecker
• get JIT-compiled performance for Hack web applications
• serve Hack scripts over HTTP with a built-in webserver

When to choose

• you are building or running applications written in Hack
• you need a high-performance JIT runtime for Hack code
• you want an all-in-one runtime, webserver, and typechecker for Hack
• you maintain a legacy PHP/Hack codebase that runs on HHVM

When to avoid

• you are starting a new PHP project, since HHVM no longer targets PHP
• you need a runtime on Windows or macOS, as official support is Linux-only
• you want a general-purpose scripting VM unrelated to Hack

Facets

application · maturity active

interpreter compiler http-server type-system cli programming-languages compilers web-development backend developer-tools cpp cli jit-compiler virtual-machine hack-language php-runtime fastcgi proxygen bytecode linux web-server

Member repositories

For agents

markdown · JSON · MCP: product_card(name="facebook/hhvm")