Hi, I've been playing with profile driven optimizations lately and it seems to work really well :) Even with -mtune=generic I am able to get a 20% time reduction for a critical piece of code. What I wonder however is, how the profiling informations are collected. E.g. when profiling pixman, I feed about 1Mio trapezoids to it, however gcc only collects ~1.5kb profile information for that Object file: > -rw-rw-r-- 1 ce ce 1784 2009-07-24 15:22 libpixman_1_la-pixman-trap.gcda It seems irrelevant how much test-data I feed duing the profiling stage, it won't grow beyond that 1.7kb. Any ideas why? Thank you in advance, Clemens Eisserer
