[arch-general] CONFIG_CC_OPTIMIZE_FOR_SIZE is not set

[André Ramaciotti da Silva]

On Thu, Oct 22, 2009 at 11:06:32PM +0200, Thomas Bächler wrote:
> Sascha Siegel schrieb:
> >Hi,
> >
> >can someone tell my whats the reason for building the arch-kernel
> >with "# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set"?
> >
> >Thank you!
> 
> Optimizing for size sacrifices performance. Read the gcc
> documentation about the -O{1,2,3,s} options.
> 

I don't know if it is as simple as that. I recall reading somewhere that
under certain circumstances a binary optimized with -Os is faster than a
binary optimized with -O2.

The reason for this is that a smaller binary may load faster than a big
one and cause less page faults.