[Python-Dev] RFC: Add a new builtin strarray type to Python? (original) (raw)
Victor Stinner victor.stinner at haypocalc.com
Mon Oct 3 15:31:23 CEST 2011
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Le 03/10/2011 04:19, Victor Stinner a écrit :
I restored this hack in Python 3.3 using PyUnicodeAppend() in ceval.c and by optimizing PyUnicodeAppend() (try to append in-place). str+=str is closer again to ''.join:
str += str: 696 ms ''.join(): 547 ms I disabled temporary the optimization for wstr string in PyUnicodeResize() because of a bug. I disabled completly resize on Windows because of another bug.
Ok, bugs fixed, all "resize" optimizations are now enabled:
Python 3.3 str += str : 119 ms ''.join() : 130 ms StringIO.join : 147 ms StringBuilder : 404 ms array('u') : 979 ms
Hum, str+=str is now the fastest method, even faster than ''.join() !? It's maybe time to optimize str.join ;-)
Victor
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