Compilation performance comparison of 3.5.0 and TreeSSA trees on MICO sources as requested in: [tree-ssa] Merge status 2004-05-03

[Jan Hubicka]

> A -Og flag that would do all optimizations that
> 
> - don't take too much time and memory ressources
> - still allow perfect debugability
> - tend to generate smalled code and debug information
> 
> Would be just perfect :). 
> 
> I would fix a rule to allow up to 5-10%
> more compile time and memory at -Og than -O0
> and zero gdb breakage.

Actually I did some measurements for my GCC summit paper, and for most of C
sources I played around, we consume more peak memory at -O0 than on
-O1...

Just my 2 cents...
Honza
> 
> But such optimization should be likely to reduce compile time anyway...
> 
> Laurent
>