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til/git/diffing-with-patience.md
2016-06-29 22:50:59 -05:00

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# Diffing With Patience
The default diff algorithm used by Git is pretty good, but it can get
mislead by larger, complex changesets. The result is a noisier, misaligned
diff output.
If you'd like a diff that is generally a bit cleaner and can afford a little
slow down (you probably can), you can instead use the `patience` algorithm
which is described as such:
> Patience Diff, instead, focuses its energy on the low-frequency
> high-content lines which serve as markers or signatures of important
> content in the text. It is still an LCS-based diff at its core, but with
> an important difference, as it only considers the longest common
> subsequence of the signature lines:
> Find all lines which occur exactly once on both sides, then do longest
> common subsequence on those lines, matching them up.
You can set this as the default algorithm by adding the following lines to
your `~/.gitconfig` file:
```
[diff]
algorithm = patience
```
or it can be set from the command line with:
```bash
$ git config --global diff.algorithm patience
```
[source](http://bryanpendleton.blogspot.com/2010/05/patience-diff.html)
h/t Josh Davey