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Re: Where does the time go?
- From: Bradley Lucier <lucier at math dot purdue dot edu>
- To: Steven Bosscher <stevenb dot gcc at gmail dot com>
- Cc: Bradley Lucier <lucier at math dot purdue dot edu>, GCC Mailing List <gcc at gcc dot gnu dot org>
- Date: Thu, 20 May 2010 17:28:28 -0400
- Subject: Re: Where does the time go?
On my codes, pre-RA instruction scheduling on X86-64 (a) improves run
times by roughly 10%, and (b) costs a lot of compile time.
The -fscheduling option didn't seem to be on in your time tests (I think
it's not on by default on that architecture at -O2).
Brad