Issue Type: Bug Bug
Assignee: Nicolas De Loof
Components: git
Created: 14/Jun/13 1:02 AM
Description:

With the fix for bug #18274, getting all git HEADs does no longer run in O(n^2) of the number of potential HEADs.

However still, after the real HEADs are calculated, Jenkins's git runs `git show [...] [that head]..[some other commit]` to obtain the list of changes.
It does so for each head, so this is another O(n^2) traversal of the repository and takes hours if you have 500 branches (which is a common thing).

Project: Jenkins
Priority: Major Major
Reporter: Niklas Hambuechen
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