The best I've found until now is gperftools (In contrast to perf you get good results even with -O3 optimization and heavily inlined code). This seems to be muc

The best I've found until now is gperftools (In contrast to perf you get good results even with -O3 optimization and heavily inlined code). This seems to be much more accurate, but I'm not sure we can handle that amount of data because we usually take longer traces.