Enable just-in-time compilation for improved performance. May prevent use of some PaX memory protection features in Gentoo Hardened.
| Package | “jit” Flag Description |
|---|---|
| dev-lang/moarvm | Enable Just-In-Time-Compiler. Has no effect except on AMD64 and Darwin. |
| net-im/prosody | Use LuaJIT instead of vanilla Lua |
| sys-devel/gcc | Enable libgccjit so other applications can embed gcc for Just-In-Time compilation. This will slow down the compiler a bit as it forces all of the toolchain to be shared libs. |
| www-apache/mod_security | Add support for the PCRE Just-in-Time optimisation, as enabled by dev-libs/libpcre with jit USE flag enabled. Might not be available on hardened systems. |
| www-apps/cgit | If the lua flag is enabled, jit uses LuaJIT instead of vanilla Lua |