Source code would be a good start??? Optimization flags??? Architecture flags??? How was gcc-4.3 vs. gcc-4.2 built??? (g++ --version will show this). -brian -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Lukasz Lew Sent: Sunday, September 21, 2008 2:20 PM To: gcc-help@xxxxxxxxxxx Subject: Performance problem Hi I have a program that when compiled with g++-4.3 is 10% slower than with g++-4.2 I tried to look at the asm output, but its way too different. How should I proceed to get my 10% back? Thanks Lukasz
