jit - Enable just-in-time compilation for improved performance. May
prevent use of some PaX memory protection features in Gentoo Hardened.
Current local flags that could probably be unified:
app-arch/libzpaq:jit - Enable just-in-time compilation for faster
compression (requires SSE2)
dev-libs/libpcre:jit - Enable Just-In-Time compilation of regexp
bytecode to machine code, through the SLJIT compiler. This feature might
conflict wtih security mitigation strategies such as NX/PaX as enabled
by Gentoo Hardened.