Subject: Re: bug#18752: 24.3.94; Why is Cygwin Emacs 2x quicker than Windows Emacs?

From: Ken Brown <[email-masked]>
Date: Sat, 18 Oct 2014 13:35:48 -0400

On 10/18/2014 12:17 PM, Eli Zaretskii wrote:
> Unoptimized builds make debugging easier, but are about 2 - 2.5 times
> slower than optimized ones.  For that reason, the usual practice is to
> produce unoptimized builds for snapshots and pretests, but optimized
> ones for official releases.
>
> Latest GCC versions support a -Og optimization switch that gives you
> the best of both worlds.

Do you happen to know how much of a performance difference there typically is 
between -Og and -O2?

Ken