SPEC regression in perl

[Jeffrey A Law]

On Tue, 2004-08-17 at 02:26, Andrew Pinski wrote:
> Jeff I think you change on the 9th:
> 2004-08-09  Jeff Law  <law@redhat.com>
> 
> 	* Makefile.in (OBJC-common): Add tree-ssa-threadupdate.c
> 	(tree-ssa-threadupdate.o): Add dependencies.
> 	* tree-ssa-threadupdate.c: New file.
> 	..., etc.
> 
> caused a performance regression in perlbmk in SPEC 2000.
> 
> Looking at  
> <http://people.redhat.com/dnovillo/spec2000/gcc/individual-run-
> ratio.html>
> I see a big dip around the 9th.
Perl is notoriously flakey -- to the point of running the same binary
with the same inputs varying by 10% without rhyme or reason.  In fact,
I've found it's the most useless of all the SPEC tests because of the
inability to get consistent results out of the bloody thing.

I wouldn't mind looking at a specific problem if you can find one, but
I'm not likely to go on what is likely a wild goose chase inside perl.

jeff