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Re: FORTIFY_SOURCE for the kernel



On Mon, 2006-01-23 at 12:31 -0500, Mike A. Harris wrote:
> Ralf Corsepius wrote:
> > On Mon, 2006-01-23 at 07:53 -0600, Josh Boyer wrote:
> > 
> >>>On Mon, 2006-01-23 at 11:30 +0900, Warren Togami wrote:
> > 
> > 
> >>>Going off at a tangent....what would people think of the idea of
> >>>switching to -Os in $RPM_OPT_FLAGS _after_ FC5 is released?
> >>
> >>If it results in some form of improvement in performance, I'm all for it.
> > 
> > 
> > The "s" in -Os stands for "size", not for "speed". So if -Os compiled
> > code-execution is faster than the default CFLAGS, something must be
> > broken elsewhere.
> 
> Not necessarily.  The reduced size of the executable makes more
> efficient use of CPU cache, which can have a net result of increased
> speed as well.

I guess you have benchmarking code to prove this claim to upstream? ;)

Ralf



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