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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Emacs Lisp JIT Compiler
Date: Sun, 19 Aug 2018 22:00:52 +0300
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> From: Tom Tromey <tom@tromey.com>
> Cc: "Eli Zaretskii" <eliz@gnu.org>,  emacs-devel@gnu.org,  Tom Tromey <tom@tromey.com>,  eggert@cs.ucla.edu
> Date: Sun, 19 Aug 2018 12:17:01 -0600
> 
> True, though it's worth noting that libjit doesn't really have
> optimization passes to speak of.

There's jit_optimize, although AFAIU, jit_compile already performs
optimizations.