How much difference does 'gcc -O<x>' make?

[Kris Kennaway]

On Fri, Mar 12, 2004 at 02:07:26AM -0800, Donald Burr wrote:
> A question occurred to me today.  How much difference does 'gcc -O<x>' 
> make in the speed of my system?
> 
> I notice some ports that claim to not work properly if compiled with 
> -O<x> (the one that comes to mind right away is XFree86 4.x, but I've 
> seen others) and I am thinking of just turning OFF -O<x> option in my 
> /etc/make.conf.  I'm just wondering how much of an impact this will 
> have on system performance.

I think you're misunderstanding: -O is almost universally fine, it's
higher settings (-O2, etc) that are recommended against.

Kris
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