[Webkit-unassigned] [Bug 243731] New: webkitscmpy/program/branch.py:116 (branch_point) is slow with many commits

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243731

            Bug ID: 243731
           Summary: webkitscmpy/program/branch.py:116 (branch_point) is
                    slow with many commits
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gsnedders at apple.com
                CC: jbedard at apple.com

This walks through each ancestor, finding the branches for each (which is itself slow, taking around 3s per branch locally, as `git branch -a --contains refish` has to walk each and every ref, but less obvious how to speed up).

We can often make a conservative first guess, which means we can then bisect the ancestors to find the appropriate branch point.

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