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Re: Using FDO to speed up compiler?
- From: Dale Johannesen <dalej at apple dot com>
- To: Jan Hubicka <jh at suse dot cz>
- Cc: Dale Johannesen <dalej at apple dot com>, Richard Henderson <rth at redhat dot com>, law at redhat dot com, gcc at gcc dot gnu dot org
- Date: Wed, 12 Feb 2003 16:40:03 -0800
- Subject: Re: Using FDO to speed up compiler?
On Wednesday, February 12, 2003, at 02:23 PM, Jan Hubicka wrote:
On Wed, Feb 12, 2003 at 10:17:10PM +0100, Jan Hubicka wrote:
The number reminds me not-so-related note. I've also hacked
makefiles
in the past to add profiling into the bootstrap. I used "make check"
for train run and measured speedup in between 5-10% on compiling
on compiling binutils on early rtlopt-branch tree.
Nice.
I will have to re-benchmark the numbers as many things has changed
since
that , but hope it won't change in the negative direction :)
One of important factors was code placement, as we had extraordinally
large insn-attrtab that time. With DFA this problem has changed a bit.
This was on x86 right? FWIW I tried this on ppc a month or so ago and
it made no significant difference.