Thanks all the great community of Python, especially the http://groups.google.com/group/comp.lang.python group for answering my silly questions. Thanks to... - Dave Peticolas for his statistics formatting patch code/suggestions. - tooker for Py3k support patch. - mjanos5 - for helping to debug few memory corruption bugs. - Mark Stuart - fix for bad fnames when Py_DEBUG is on. Special thanks to the authors of cProfile module Brett Rosen and Ted Czotter. Some parts/ideas of yappi are taken from the source code of cProfile.