diff --git a/source/performance.txt b/source/performance.txt index 901114758f328de75a8d78780abc886ef1122ad1_c291cmNlL3BlcmZvcm1hbmNlLnR4dA==..617ca383d1210202892b054f60cf6759522a2b02_c291cmNlL3BlcmZvcm1hbmNlLnR4dA== 100644 --- a/source/performance.txt +++ b/source/performance.txt @@ -56,6 +56,11 @@ might be worthwhile to consider rewriting it as a pure Python version, using something like ``ctypes``. +* **Missing RPython modules**: A few modules of the standard library + (like ``csv`` and ``cPickle``) are in C in CPython, but in pure Python + in PyPy. Sometimes the JIT is able to do a relatively good job, and + sometimes not. In any case it is still slower in PyPy than in CPython. + We generally consider things that are slower on PyPy than CPython bugs of PyPy. In case you find some issue that is not documented here, please report it to our `bug tracker`_ for investigation.