[pypy-dev] PyPy doesn't make code written in C faster

Eleytherios Stamatogiannakis estama at gmail.com
Thu May 30 12:04:12 CEST 2013

On 30/05/13 11:23, Armin Rigo wrote:
> ...   There are also other cases where
> PyPy's performance is very bad, like cpyext on an extension module
> with lots of small C API calls.  I believe that it would still make
> sense to list such cases in the official benchmark, and have the
> descriptions of the benchmarks explain what's wrong with them.

On the other hand, there are also valid benchmark cases with very bad 
performance. From the top of my mind, reading a unicode text file was 
around 10-12 times slower (if i remember correctly) last time that i 


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