Mohamed Bana wrote:
Hi guys,
has anyone luatex working with luajit? so far i've only managed to get
to compile a 32bit version under ubuntu 64 bit - /luajit hasn't been
ported to a 64 bit yet/.
Currently the interpreter works.
here's the difference in speed between standard lua and the jit
version;
http://shootout.alioth.debian.org/u32q/benchmark.php?test=all&lang=all&box=1,
and generally; http://shootout.alioth.debian.org/.
In summary; I'd just like to know how much roughly how much effort is
required and If anyone has looked into it.
i played with it when we started with luatex (luajit < 2)
my concusion at that time was that it does not really speeds up luatex
unless you use it for number crunching; at the moment i played with it i
had to tweak the jit (runtime) parameters )
of course luajit is impressive but i'm not sure if it pays off for the
kind if tasks luatex does - node list processing to mention one - unless
for instance it turns user data function calls into inline code
also code that only is used once in a run does not profit much
talking of speed, a rather sensitive area is garbage collection; tuning
the parameters turned out not to help speed up luatex
yet another factor is the binary itself ... for instance, where luatex
0.36 takes 52 sec for our test document, version 0.37 takes 44 seconds
(on my machine)
of course i might be wrong
Hans
ps. at that time we decided not to spend too much time on it as it is
only available for some architectures and it adds complexity so it went
on the > 1.0 agenda
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