I am seeing a 20% slowdown with feedback optimization. Does anyone have any thoughts on this. These are the steps I followed
1. Compiled the application using -fprofile-generate. I used this flag both in the compile flags and as part of the link flags. I also had to use libgcov.a during the link phase otherwise it would die looking for gcov functions. 2. Ran a representative work-load 3. Followed (1) except that instead of -fprofile-generate used -fprofile-use I had to drop the "-fprofile-use" on 2 files as they had corrupted profile data. I have tried this experiment with -fprofile-arc and -fbranch-probabilities as well and I get the same 20% slowdown. Thx -girish
