Re: -Os versus -O2

Rene Herman
2007-06-25T01:27:32Z

On 06/25/2007 02:41 AM, Adrian Bunk wrote:

> The interesting questions are:
> Does -Os still sometimes generate faster code with gcc 4.2?
> If yes, why?

I would wager that the CPU type makes more of a difference than the compiler
version. That is, I'd expect my Duron with it's "puny" 64K L1 to have a very
different profile than it's Athlon brother with 256K L1. Not to mention CPUs
with as little as 8K L1 (P1).

I can't quote numbers -- it's a bit hard to test those things anyway as it's
a system-global effect and not su much that's easily isolated in a dedicated
benchmark.

Rene.