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To: gentoo-dev@g.o
From: Pacho Ramos <pacho@g.o>
Subject: Re: RFC: new global USE flag: jit
Date: Mon, 14 May 2012 20:48:57 +0200
El lun, 14-05-2012 a las 20:09 +0200, Agostino Sarubbo escribió:
> On Monday 14 May 2012 14:05:12 Alexandre Rostovtsev wrote:
> > I propose adding the following global USE flag:
> > 
> > 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.
> > 
> > dev-python/pypy:jit - Enable the JIT compiler
> > 
> > dev-scheme/racket:jit - Enable just-in-time compiler
> > 
> > media-sound/csound:luajit - Use the lua just-in-time compiler
> > dev-lang/luajit instead of dev-lang/lua
> > 
> > net-libs/webkit-gtk:jit - Enable JIT javascript compiler (disabling it
> > will cause performance penalty)
> > 
> > www-client/epiphany:jit - Allow using net-libs/webkit-gtk that has the
> > JIT javascript compiler enabled
> > 
> > www-client/luakit:luajit - Use the lua just-in-time compiler
> > dev-lang/luajit instead of dev-lang/lua, which should make luakit
> > faster.
> > 
> > www-client/seamonkey:methodjit - Enable JIT for JavaScript using
> > MethodJIT for faster JS performance. Hardened users can disable this
> > USE-flag to use MPROTECT on grsecurity kernels.
> > 
> > www-servers/nginx:pcre-jit - Enable JIT for pcre
> > 
> > x11-libs/qt-core:jit - Enables JIT for Javascript usage inside Qt
> > 
> > x11-libs/qt-script:jit - Enables JIT for Javascript usage inside Qt
> > 
> > x11-libs/qt-webkit:jit - Enable JavaScriptCore just-in-time compiler for
> > faster JavaScript execution
> > 
> > -Alexandre.
> +1

+1 also ;)
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References:
RFC: new global USE flag: jit
-- Alexandre Rostovtsev
Re: RFC: new global USE flag: jit
-- Agostino Sarubbo
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Updated Jun 29, 2012

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