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[Bug middle-end/12524] [tree-ssa] Slow-down and memory consumption increased 6x (C++ code, -O3)
- From: "amacleod at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Oct 2003 20:34:44 -0000
- Subject: [Bug middle-end/12524] [tree-ssa] Slow-down and memory consumption increased 6x (C++ code, -O3)
- References: <20031006151159.12524.gerald@pfeifer.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12524
------- Additional Comments From amacleod at redhat dot com 2003-10-06 20:34 -------
The changes I checked into the tree-ssa branch today to improve compile time of
CCP appears to have some effect on this. There are secondary effects which I
guess someone should sort out :-)
Anyway, on my machine, user time for this file is actually a few seconds faster
for tree-ssa (62 seconds mainline, 59 seconds tree-ssa), but wall time in the
parser blows up, resulting in a slower real time:
mainline:
parser : 7.96 (13%) usr 0.98 (28%) sys 18.18 (23%) wall
tree-ssa:
parser : 8.31 (14%) usr 1.22 (25%) sys 42.95 (36%) wall
Andrew