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Re: 100x -O0 Compile Time Regression {3.2,3.3} -> {3.4,3.5}
- From: Mike Stump <mrs at apple dot com>
- To: John Vickers <John at xza5 dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Thu, 12 Feb 2004 16:32:41 -0800
- Subject: Re: 100x -O0 Compile Time Regression {3.2,3.3} -> {3.4,3.5}
On Thursday, February 12, 2004, at 01:50 PM, John Vickers wrote:
We've got some generated C++ which compiles in about 10s (on a P4
2800) at -O0 with gcc-3.2 or 3.3.2, but takes about 1000s with 3.4.0
or 3.5.0.
Oh, you will want to configure with --disable-checking and ensure that
you built an optimized compiler. The first isn't the default in
development sources, the later should be, but, might not if you do
builds in the gcc dir.
Also, you should be using bootstrap to build the compiler.