Re: [Tinycc-devel] Preprocessor performance tuning

[Vladimir Vissoultchev]

Ok, here is a new version of the patch that uses custom allocators for small
instances of `TokenSym`, `CString` and `TokenString`. I'm getting at least
15% boost here (45MB/s -> 55MB/s) as the `malloc`/`free` calls get down to
less that 1% of overall exec time in the profiler.

This approach is preallocating at least 3MB of RAM for tiny instances,
configurable through the new TOKSYM_TAL_SIZE, CSTR_TAL_SIZE and
TOKSTR_TAL_SIZE in tcc.h along with the limit on instance sizes the
allocators consider. With current settings I'm geting on all allocators no
more that 70% buffer usage on (5 times) nginx sources compilation.

cheers,
</wqw>

-----Original Message-----
From: Tinycc-devel [mailto:address@hidden
On Behalf Of Sergey Korshunoff
Sent: Friday, April 15, 2016 6:11 PM
To: address@hidden
Subject: Re: [Tinycc-devel] Preprocessor performance tuning

> @seyko: Can you please test it with tccboot. I get a 7-8% better 
> overall tcc performance with the patch applied.

Yes, this version is faster. But on tccboot there is only a 4% speedup:
from 24.5 MiB/s to 25.5 MiB/s

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