On Wed, Feb 8, 2017 at 12:59 AM, Victor Stinner <victor.stin...@gmail.com> wrote: > Hi, > > FYI CPython 3.7 is now faster than CPython 2.7 on most benchmarks. It > would be interesting to investigate why 12 benchmarks are still slower > to check if we missed something obvious. > > Comparison, ignoring differences smaller than 10%: > > haypo@speed-python$ python3 -m perf compare_to > 2017-01-03_11-17-2.7-5988caffbff9.json > 2017-02-06_07-15-default-e06af4027546.json -G --min-speed=10 > Slower (12): > - python_startup_no_site: 3.11 ms +- 0.02 ms -> 8.33 ms +- 0.04 ms: > 2.68x slower (+168%) > - python_startup: 6.42 ms +- 0.04 ms -> 14.1 ms +- 0.1 ms: 2.20x slower > (+120%)
The top two slower benchmark is startup. There are some unavoidable reasons (io, importlib, and more rich types based on abc). But I sent two pull requests reduce cost of site.py. * http://bugs.python.org/issue29585 * http://bugs.python.org/issue29592 If they are merged, (python_startup - python_startup_no_site) will be very close to Python 2.7. For more optimization, I think we need to write some function in C for importlib. _______________________________________________ Speed mailing list Speed@python.org https://mail.python.org/mailman/listinfo/speed
