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[Bug c++/23835] case where gcc 4.1.0 -O3 compile takes 4 times longer than gcc 3.4.3, on ia64
- From: "jaffe at broad dot mit dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Sep 2005 22:03:31 -0000
- Subject: [Bug c++/23835] case where gcc 4.1.0 -O3 compile takes 4 times longer than gcc 3.4.3, on ia64
- References: <20050912163013.23835.jaffe@broad.mit.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From jaffe at broad dot mit dot edu 2005-09-13 22:03 -------
We recompiled gcc 4.1.0 with checking disabled. The results are now less
dramatic but still of concern: optimized 4.1.0 compiles take about twice as
long as 3.4.3 compiles on the test case:
Compile time in seconds
-O0 -O1 -O2 -O3
3.4.3 5.659 9.515 13.811 14.779
4.1.0 5.863 22.025 32.208 32.611
% gcc -v
Using built-in specs.
Target: ia64-unknown-linux-gnu
Configured with: ../configure --prefix=/wga1/gcc --enable-checking=release
Thread model: posix
gcc version 4.1.0 20050730 (experimental)
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Ever Confirmed| |1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23835