Is there a bug in libsvn_diff?
From: Albert Jin <albert.jin_at_gmail.com>
Date: 2006-08-13 10:13:49 CEST
I worked on a diff algorithm a lot recently (http://xindiff.cvs.sourceforge.net/). I tried different implementations on this two files, (packed as follows)
http://xindiff.sourceforge.net/diff_t5.zip (t5.txt: 467354 lines, t6.txt: 334422 lines)
XinDiff takes about 3 minutes and find out that the LCS count is 22926 and output html diff view, while the one using libsvn_diff (http://subversion.tigris.org/tools_contrib.html#diff) takes 30 minutes and does seems to get through. I suspect that there could be a dead loop.
Note that XinDiff does perfect LCS calculation and works as GNU diff with --minimal option.
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