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RE: Gcc 3.1 performance regressions with respect to 2.95.3
- From: "James Mansion" <james at westongold dot com>
- To: <tprince at computer dot org>, "Daniel Berlin" <dan at dberlin dot org>, "Peter Schmid" <schmid at snake dot iap dot physik dot tu-darmstadt dot de>
- Cc: "Jan Hubicka" <jh at suse dot cz>, "Jason Merrill" <jason at redhat dot com>, <gcc at gcc dot gnu dot org>, <libstdc++ at gcc dot gnu dot org>
- Date: Tue, 19 Mar 2002 22:05:59 -0000
- Subject: RE: Gcc 3.1 performance regressions with respect to 2.95.3
>Others have been complaining about compilers which require longer compile
>time than MSVC6 to produce code which runs faster than MSVC6 code. gcc-3.1
>is in a good position, if only -O or -Os is needed to produce better code
>than MSVC6.
I think the problem is when you take 10 times as long and run
5% faster.
Much of that is down to aggressive use of precompiled headers,
and structuring the Win32-targetted code to achieve this, but
I still find that VC6 will build large C++ codebases like TAO
many many times faster than any UNIX compiler I've ever tried.
Which is a shame, because the things I build on Win32 are just
proxies that I wrap with ATL shims.
Anyway, you'l be needing to consider the VC7 output soon.
James