[MacPorts] #52985: buildbot: dependency calculation sometimes prohibitively expensive

[MacPorts]

#52985: buildbot: dependency calculation sometimes prohibitively expensive
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 Reporter:  mojca           |      Owner:  admin@…
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  server/hosting  |    Version:  2.3.5
 Keywords:  buildbot        |       Port:
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 Sometimes even the presence of failcache doesn't prevent the build jobs to
 finish in a timely manner.

 See for example [https://build.macports.org/builders/ports-10
 .5_ppc_legacy-builder/builds/11578 this build] where `install-dependency`
 needed 45 minutes to calculate dependencies before it was interrupted by
 the build mater. That time would be more than sufficient to actually
 install all other dependencies :)

 Some people say that the time increases with dependencies in a non-linear
 (quadratic?) way.

 This ticket might belong to base, not sure.

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Ticket URL: <https://trac.macports.org/ticket/52985>
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