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Re: gcc compilation speed
- From: Karel Gardas <kgardas at objectsecurity dot com>
- To: Steven Bosscher <stevenb at suse dot de>
- Cc: GCC Mailing List <gcc at gcc dot gnu dot org>
- Date: Tue, 20 Jan 2004 08:41:11 +0100 (CET)
- Subject: Re: gcc compilation speed
On Tue, 20 Jan 2004, Steven Bosscher wrote:
> On Tuesday 20 January 2004 07:30, Matt Austern wrote:
> > My main concern, actually, is that 3.5 may be worse. It may not
> > be fair to talk about performance measurements this early, when
> > tree-SSA hasn't even been merged into mainline, but so far it
> > looks like it may be making things slower, even at low
> > optimization levels. I don't think we have a very clear idea
> > yet of what's causing the slowdown; one disturbing possibility
> > is that it might be because we're carrying around twice as much
> > intermediate representation.
> Numbers? Bug reports?
I'm afraid Matt is right at least for our case of MICO project: C++ CORBA
implementation. I have tested tree-ssa twice and it was always slower
than 3.x and main-line that time. I will try to come with some numbers
with testing on MICO's ORB core, just to see if it is still right.
Karel Gardas email@example.com
ObjectSecurity Ltd. http://www.objectsecurity.com