2011/10/7 Stefan Behnel <[email protected]>: > Vitja Makarov, 06.10.2011 23:12: >> >> Here is small comparison on compiling urllib.py with cython: >> >> ((e8527c5...)) vitja@mchome:~/work/cython-vitek-git/zzz$ time python >> ../cython.py urllib.py >> >> real 0m1.699s >> user 0m1.650s >> sys 0m0.040s >> (master) vitja@mchome:~/work/cython-vitek-git/zzz$ time python >> ../cython.py urllib.py >> >> real 0m2.830s >> user 0m2.790s >> sys 0m0.030s >> >> >> It's about 1.5 times slower. > > I assume this uses a compiled Cython? That's a pretty serious regression for > plain Python code then. Again, this needs proper profiling. >
No, that was pure python cython. > We may also want to disable certain steps in the pipeline based on the > syntax features used. If a feature is not used that has its own (set of) > visitors, we can disable them completely. Detection already happens based on > the .pyx/.py distinction, but could additionally use a detector (e.g. in the > post-parse phase) that sets up skip flags. One example is the closure > building step, which could be skipped if there are no closures. > One more think I've found is that many unused utilities are loaded. -- vitja. _______________________________________________ cython-devel mailing list [email protected] http://mail.python.org/mailman/listinfo/cython-devel
