[issue6931] dreadful performance in difflib: ndiff and HtmlDiff

[Christopher Cabanne]

Christopher Cabanne added the comment:

Here is a timeit command to test with the attached test files: 

python -m timeit -n 10 "import difflib; difflib.HtmlDiff().make_table(open('left500.txt').readlines(), open('righ500.txt').readlines())"

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6931>
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