[New-bugs-announce] [issue7846] Fnmatch cache is never cleared during usage

[Andrew Clegg]

New submission from Andrew Clegg <ancl at pml.ac.uk>:

The fnmatch module has a cache of translation between glob patterns and compiled regular expressions. However this cache is never emptied; only added to. I am writing a python program which as part of its execution checks millions of unique globs - this causes the fnmatch cache to grow enormous.

Attached is a patch to limit the size of the fnmatch cache to 100 (chosen to be the same size as the re module).

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components: Library (Lib)
files: fnmatch.patch
keywords: patch
messages: 98786
nosy: andrewclegg
severity: normal
status: open
title: Fnmatch cache is never cleared during usage
versions: Python 2.5
Added file: http://bugs.python.org/file16116/fnmatch.patch

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<http://bugs.python.org/issue7846>
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