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Re: gcc-4.0.0-prerelease: -O0 build time higher than -O1?
- From: ja2morri at csclub dot uwaterloo dot ca (James A. Morrison)
- To: Rene Rebe <rene at exactcode dot de>
- Cc: gcc at gnu dot org, t2 developers mailing list <t2 at exactcode dot de>
- Date: 23 Mar 2005 19:56:24 -0500
- Subject: Re: gcc-4.0.0-prerelease: -O0 build time higher than -O1?
- References: <42420258.9010504@exactcode.de>
Rene Rebe <rene@exactcode.de> writes:
> Hi all,
>
> I'm just doing the first benchmarking with the 4.0.0 pre release
> (20050319) and just noticed that -O0 build time is not always the
> fastest. (In contrast to what the changes suggest: "When compiling
> without optimizations (-O0), the C++ frontend is much faster than in
> any previous versions of GCC. ..." - Or is it just that previous
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This comparison is against other versions of GCC not other optimization
levels of GCC. You can check the list archives for comparisons of compile
times with GCC 4.0 against other optimization levels and against other
versions of GCC.
--
Thanks,
Jim
http://www.student.cs.uwaterloo.ca/~ja2morri/
http://phython.blogspot.com
http://open.nit.ca/wiki/?page=jim