Re: [boost] [Endian] Performance

Subject: Re: [boost] [Endian] Performance
From: Arash Partow (arash_at_[hidden])
Date: 2011-09-05 19:05:16

Phil Endecott wrote:
> 
> I've tested this on two systems:
> (A): Marvell ARMv5TE ("Feroceon") @ 1.2 GHz, g++ 4.4
> (B): Freescale ARMv7 (i.MX53, Coretex A8) @ 1.0 GHz, g++ 4.6.1
> 
> Compiled with: --std=c++0x -O4
> 

What do the numbers look like if you compile with -march=native switch set? or if you're cross-compiling replace 'native' with correct gcc supported arch, 

To futher that, is there much of a difference when compiled with pgo? -fprofile-generate run -fprofile-use. btw I've found that in some situation O2 performs better than O3 or O4 - though pgo cleans up a lot of those inconsistencies at O3+ levels.