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[tree-ssa mudflap] slow startup
- From: Eyal Lebedinsky <eyal at eyal dot emu dot id dot au>
- To: gcc list <gcc at gcc dot gnu dot org>, "Frank Ch. Eigler" <fche at redhat dot com>
- Date: Sun, 29 Jun 2003 14:17:48 +1000
- Subject: [tree-ssa mudflap] slow startup
- Organization: Eyal at Home
Since the changes early this month Everything is very slow. I now
checked and I see that the whole slowdown in before my main() is
entered. It seems that everything is registered up-front when the
DLLs are opened.
Was there a change in this area?
With -mode-nop a trivial program starts fast:
real 0m0.025s
user 0m0.020s
sys 0m0.000s
Without any options, build from 20030603-210427:
real 0m0.779s
user 0m0.740s
sys 0m0.010s
Without any options, build from 20030626-102123:
real 0m7.089s
user 0m7.030s
sys 0m0.050s
This is a compile time issue, using different libmudflap
has very little effect.
A natural suspect is the wrappers patch, however I was running
with it for a long while before it was accepted and did not see
any significant slowdown.
--
Eyal Lebedinsky (eyal@eyal.emu.id.au) <http://samba.org/eyal/>