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Re: gcc 3.5 integration branch proposal
- From: Laurent GUERBY <laurent at guerby dot net>
- To: Karel Gardas <kgardas at objectsecurity dot com>
- Cc: Mark Hahn <hahn at physics dot mcmaster dot ca>, gcc at gcc dot gnu dot org
- Date: Tue, 20 Jan 2004 13:07:35 +0100
- Subject: Re: gcc 3.5 integration branch proposal
- References: <Pine.LNX.4.43.0401200919210.8443-100000@thinkpad.wg-ro-gar1.inext.cz>
On Tue, 2004-01-20 at 09:25, Karel Gardas wrote:
> As a GCC user I'm insterested in as fast as possible C++ compiler. Guys,
> this is a real pain to see how Comeau and/or Intel compiles faster than
> GCC 3.3.x :-( (I'm sorry for this complain). And in addition I guess these
> two are not the fastest C++ compilers in the industry... I was really
> surprised seeing M$ VC 7.1 compiling much faster with all optimization
> switch on than GCC at -O0 and even the code produced runs a bit faster
> than those compiled by GCC with -O2...
As requested by GCC developpers willing to care about your needs,
please stop posting undocumented impressions and start submitting fully
documented (version, compile/exec times, flags, code) cases in bugzilla.
One of the only cases (C) with data posted so far between ICC and GCC
was showing current GCC compiling FASTER.
<<
compile benchmark
time time
-------- ---------
gcc mainline 1:43 7:59
w/ -mfpmath=sse 1:46 6:30
gcc tree-ssa 1:46 7:35
w/ -mfpmath=sse ** SEG fault **
icc 8.0 1:53 5:50
>>
1:46 is faster than 1:53, sorry.
Laurent