gregory p smith amuhkryptoorg sat apr 12 2008 1109 jeroen ruigrok van der werven kyfxfucinnomineorg wrote tests concentrating gcc partly based feedback got results httpwwwinnomineorg20080412python26compileroptionsresults executive summary python needs compiled o2 o3 optimization level results gcc 421 doubling execution time using o1 still 15 slower using o2 using mtunenative marchnative shave 0102 seconds otherwise find much difference using march mfpmath present profileguided optimization help much might expected pushed kind optimization mtunemarch combination gcc 413 im finding profile guided optimization trained pybench regrtest make measurable difference 25 overall time 1020 pybench tests havent run benchmarks enough times confident results yet ill report back data im testing pybench regrtest profiling training runs check special makefile target easy gcc profile guided compiles shortly want faster builds easily produce thu 07 aug 2008 071453 0700 pythondev python 26a2 execution times various compilers