[gambit-list] Performance of different versions of gcc

Hendrik Boom hendrik at topoi.pooq.com
Tue May 1 11:51:09 EDT 2012


On Tue, May 01, 2012 at 09:35:24AM -0400, Marc Feeley wrote:
> 
>
> Strangely, with clang 3.0 it takes less time to compile with -O2 
than 
> with -O1.

If I recall correctly, this phenomenon was first noticed in the 60's 
with IBM's Fortran H compiler. It turns out that most of the time was 
spent in the final process of putting instrutions together.  After 
optimizing, there was less code to generate.

-- hendrik


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