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Wed Jan 28 01:39:37 CET 2009 · http://mail.python.org/pipermail/python-dev/2009-January/085583.html

Daniel Stutzbach <daniel <at> stutzbachenterprises.com> writes:
> For the "10MB whole contents at once" test, we then have:
> (assuming the code does no pipelining of disk I/O with decoding)
> 
> 10MB / 980MB/s to read from disk = 10 ms
> 10MB / 250MB/s to decode to utf8 = 40 ms
> 10MB / (10ms + 40ms) = 200 MB/s 
> 
> In practice, your results shows around 90 MB/s.  That's at least vaguely in
> the same ballpark.

Yes, the remaining CPU time is spent in the IncrementalNewlineDecoder (which
does universal newline translation).

Antoine.

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