2013/7/18 Eleytherios Stamatogiannakis <[email protected]> > Why is there such a huge speed difference between cPickle.dump( ... f) and > f.write(cPickle.dumps(...)) ?
Did you count the number of calls to f.write? pickle call write() once per pickled object. Now, pypy's implementation of buffered file uses a (RPython) list of strings, and does a final ''.join. This is probably much less efficient than the RStringIO implementation. -- Amaury Forgeot d'Arc
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