[MacPorts] #30670: make signed sync/selfupdate faster

[MacPorts]

#30670: make signed sync/selfupdate faster
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  Reporter:  sdavids@…    |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.0.1
Resolution:               |   Keywords:
      Port:               |
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Comment (by cal@…):

 The reason the tarball is synced rather than the files themselves is that
 the tarball is cryptographically signed with a detached signature.

 Since the tarball does not use any compression, rsync should be able to
 copy only the deltas, i.e. syncing via tarball shouldn't be that much
 slower than syncing the files directly, especially since you should have
 less file operations when syncing the tarball (one file vs. a couple
 thousand).

 Switching to the non-tarball sync method will automatically disable
 signature verification, i.e. you can no longer be sure the portfiles
 haven't been tampered with along the way, so I'd suggest not going this
 way.

 So the correct thing to do here is speed up the extraction of the tarball,
 if possible.

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Ticket URL: <https://trac.macports.org/ticket/30670#comment:6>
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