Re: -O3 vs. -Os
Re: -O3 vs. -Os
- Subject: Re: -O3 vs. -Os
- From: Steve Checkoway <email@hidden>
- Date: Mon, 16 Jan 2006 23:41:20 -0800
On Jan 16, 2006, at 11:30 PM, Rustam Muginov wrote:
I believe that -O3 is only useful in the heavily computational tasks.
"Regular" apps would benefit from -Os optimizaiton, and only
manualy-tuned high-performance libraries would work faster with -O3
Two questions. First, how would you define "Regular"?
Second, on what do you base that assertion? The idea that smaller
code is faster makes perfect sense when you think about it from a
cache point of view. Turning off optimizations and making the code
larger at the same time doesn't seem likely to improve performance.
- Steve
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