Safe (but quick) GCC settings on a PC64 with 5.3?

[Kirk Strauser]

On Monday 13 December 2004 14:53, David O'Brien wrote:

> I would use "-O2 -fno-strict-aliasing" otherwise there can be problems
> with ports.

Thanks for the tip.  Would that apply to world and kernel as well?  I tried 
building the OpenSSL library without "-fno-strict-aliasing" and got a few 
type-punning warnings, but it seemed to run correctly.

The GCC manual says that flag disables some optimizations.  Using "openssl 
speed" as a rough benchmark didn't show a statistically significant 
difference between using it or not; is anyone aware of any circumstances 
where using it needlessly would invoke a significant penalty?

By the way, my initial benchmark showed about a 50% speed increase in 
OpenSSL by using "-O2" instead of "-O".  Assuming everything continues to 
work correctly, I'm very pleased about how this is turning out.
-- 
Kirk Strauser
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