Antoine Pitrou <[EMAIL PROTECTED]> added the comment: This new patch completes the bytecode modifications. For/while loops as well as list comprehensions and generator expressions are a bit faster now. Also, as a side effect I've introduced a speed improvement for "if" statements and expressions...
Some micro-benchmarks (completing the ones already given above): ./python Tools/pybench/pybench.py -t IfThenElse Before: 167ms per round After: 136ms per round ./python -m timeit -s "y=range(100)" "sum(x for x in y)" Before: 10000 loops, best of 3: 20.4 usec per loop After: 100000 loops, best of 3: 17.9 usec per loop ./python -m timeit -s "y=range(100)" "sum(x for x in y if x)" Before: 10000 loops, best of 3: 28.5 usec per loop After: 10000 loops, best of 3: 23.3 usec per loop ./python -m timeit -s "y=range(100)" "sum(x for x in y if not x)" Before: 100000 loops, best of 3: 16.4 usec per loop After: 100000 loops, best of 3: 12.1 usec per loop ./python -m timeit -s "x,y,z=1,2,3" "x if y else z" Before: 1000000 loops, best of 3: 0.218 usec per loop After: 10000000 loops, best of 3: 0.159 usec per loop A couple of tests seem to be failing in obscure ways in the test suite, I'll try to examine them. Most of the test suite runs fine though. Added file: http://bugs.python.org/file9870/loops6.patch __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2459> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
