diff --git a/source/performance.txt b/source/performance.txt index 57e99e68ffb79bf695e1ca83d041d735809ac326_c291cmNlL3BlcmZvcm1hbmNlLnR4dA==..78c58258887b1426da186c839cfd559bbd015efc_c291cmNlL3BlcmZvcm1hbmNlLnR4dA== 100644 --- a/source/performance.txt +++ b/source/performance.txt @@ -63,10 +63,11 @@ that uses something like ``ctypes`` for the interface. * **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 good job on them, and - sometimes not. In most cases (like ``csv`` and ``cPickle``), we're slower - than cPython, with the notable exception of ``json`` and ``heapq``. + (like ``csv`` and ``cPickle``) are written in C in CPython, but written + natively in pure Python in PyPy. Sometimes the JIT is able to do a + good job on them, and sometimes not. In most cases (like ``csv`` and + ``cPickle``), we're slower than cPython, with the notable exception of + ``json`` and ``heapq``. We generally consider things that are slower on PyPy than CPython to be bugs of PyPy. If you find some issue that is not documented here,