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Re: gcc compile-time performance
- From: law at redhat dot com
- To: dewar at gnat dot com (Robert Dewar)
- Cc: gdr at codesourcery dot com, mark at codesourcery dot com, gcc at gcc dot gnu dot org, scott at coyotegulch dot com
- Date: Sat, 18 May 2002 11:48:11 -0600
- Subject: Re: gcc compile-time performance
- Reply-to: law at redhat dot com
In message <20020518171850.8973EF2A59@nile.gnat.com>, Robert Dewar writes:
> > In order to support those uses, and to be competitive with other
> > compilers, we do need to improve the speed of the compiler. I've heard
> > this from too many real world customers with spending authority to
> > believe any different.
> The question is can you find ways to make substantial increases in speed.
> I still don't see it being worthwhile to flail away looking at profiles and
> tingering with conditionals. You are only going to get 10-30% that way
> and it is not going to be enough to be significant.
I disagree strongly. We've got customers where a 30% improvement in
compile-time means cutting a day off their build cycles. I don't know
precisely how much time it would cut off (for example) a build of RHL, but
I would bet it would be enough to send our OS team into a state of ecstasy.