Different buildbot speeds

[Ryan Schmidt]

Should our 3 buildbots be roughly comparable in hardware configuration? I ask because I committed updates to php54 and php55 and they took startlingly differing times to build.

The snowleopard buildbot took 1 hour 10 minutes: https://build.macports.org/builders/buildports-snowleopard-x86_64/builds/19861

This seems about normal.

The lion buildbot took 4 hours 21 minutes: https://build.macports.org/builders/buildports-lion-x86_64/builds/13509

The mtln buildbot took 5 hours 54 minutes: https://build.macports.org/builders/buildports-mtln-x86_64/builds/7375

These took a lot longer than I think they should.

With previous php updates, all three buildbots used to complete in roughly the same time.