[Cython] Utilities, cython.h, libcython

[Vitja Makarov]

2011/10/7 Stefan Behnel <stefan_ml at behnel.de>:
> Vitja Makarov, 06.10.2011 23:12:
>>
>> Here is small comparison on compiling urllib.py with cython:
>>
>> ((e8527c5...)) vitja at mchome:~/work/cython-vitek-git/zzz$ time python
>> ../cython.py urllib.py
>>
>> real    0m1.699s
>> user    0m1.650s
>> sys     0m0.040s
>> (master) vitja at 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.