Line-by-line mode sub-optimal. about google-diff-match-patch HOT 5 CLOSED

Confirmed.  Investigation shows that this is the result of the line-by-line 
speedup.  There exist cases such as this one where this speedup is sub-optimal. 
 Your example is the worst I've ever seen.  I need to take a closer look at 
whether this speedup is worth it.

If you want a truly accurate diff, use diff_main(text1, text2, false).  The 
third argument (which defaults to true) controls the line-by-line speedup.

[deleted comment]

Issue 46 has been merged into this issue.

The root cause has been unexpectedly tracked down to diff_cleanupSemantic and a 
changelist has been submitted for review.  Should take a week before it is 
published.

Sorry for the delay.  I've just pushed a new version which fixes this class of 
issues.  As always, the upgrade is a drop-in replacement.