diffcore-rename: speed up register_rename_src #996
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This took 3 seconds off of a status on my large test repo. |
dscho
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Dec 22, 2016
| @@ -94,6 +106,7 @@ static struct diff_rename_src *register_rename_src(struct diff_filepair *p) | |||
| first = next+1; | |||
| } | |||
|
|
|||
| found_it: | |||
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Teach register_rename_src() to see if new file pair can simply be appended to the rename_src[] array before performing the binary search to find the proper insertion point. This is a performance optimization. This routine is called during run_diff_files in status and the caller is iterating over the sorted index, so we should expect to be able to append in the normal case. The existing insert logic is preserved so we don't have to assume that, but simply take advantage of it if possible. Signed-off-by: Jeff Hostetler <[email protected]>
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The `diff` operation saw [performance improvements](git-for-windows/git#996) when working on a huge number of renamed files. Signed-off-by: Johannes Schindelin <[email protected]>
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Teach register_rename_src() to see if new file pair
can simply be appended to the rename_src[] array before
performing the binary search to find the proper insertion
point.
This is a performance optimization. This routine is called
during run_diff_files in status and the caller is iterating
over the sorted index, so we should expect to be able to
append in the normal case. The existing insert logic is
preserved so we don't have to assume that, but simply take
advantage of it if possible.
Signed-off-by: Jeff Hostetler [email protected]