Re: git-diff-tree inordinately (O(M*N)) slow on files with many changes

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Linus Torvalds <torvalds@xxxxxxxx> wrote:
> On Mon, 16 Oct 2006, Linus Torvalds wrote:
...
> So I think xdiff has chosen too small a hash. Can you try what happens if
> you change xdl_hashbits() (in xdiff/xutil.c) instead? Try making it return
> a bigger value (for example, by initializing "bits" to 2 instead of 0),
> and see if that makes a difference.

It makes no difference.

Bear in mind that there are a *lot* of duplicate lines in the files
being compared: filtering each through "sort -u" removes 40-50k lines.
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