[MacPorts] #52750: /changeset/:commitid/:repo is very slow for changes that do not exist

[MacPorts]

#52750: /changeset/:commitid/:repo is very slow for changes that do not exist
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  Reporter:  neverpanic      |      Owner:  admin@…
      Type:  defect          |     Status:  new
  Priority:  High            |  Milestone:
 Component:  server/hosting  |    Version:  2.3.4
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by neverpanic):

 Problem seems to be that checking whether a commit is in a repository is
 very slow with PyGit, due to shelling out to the git command line binary,
 see
 https://github.com/edgewall/trac/blob/1.0-stable/tracopt/versioncontrol/git/PyGIT.py#L700

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Ticket URL: <https://trac.macports.org/ticket/52750#comment:1>
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