[ python-Bugs-849046 ] gzip.GzipFile is slow

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Bugs item #849046, was opened at 2003-11-25 10:45
Message generated for change (Comment added) made by jimjjewett
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Category: Python Library
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Ronald Oussoren (ronaldoussoren)
Assigned to: Nobody/Anonymous (nobody)
Summary: gzip.GzipFile is slow

Initial Comment:
gzip.GzipFile is significantly (an order of a magnitude) 
slower than using the gzip binary. I've been bitten by this 
several times, and have replaced "fd = gzip.open('somefile', 
'r')" by "fd = os.popen('gzcat somefile', 'r')" on several 
occassions.

Would a patch that implemented GzipFile in C have any 
change of being accepted?

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Comment By: Jim Jewett (jimjjewett)
Date: 2003-11-25 12:35

Message:
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Which compression level are you using?

It looks like most of the work is already done by zlib (which is in C), but GzipFile defaults to compression level 9.  Many other zips (including your gzcat?) default to a lower (but much faster) compression level.  


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