[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2894: Speed up the test suite with concurrent test runners

[Tahoe-LAFS]

#2894: Speed up the test suite with concurrent test runners
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 Reporter:  exarkun             |          Owner:
     Type:  enhancement         |         Status:  new
 Priority:  normal              |      Milestone:  undecided
Component:  dev-infrastructure  |        Version:  1.12.1
 Keywords:                      |  Launchpad Bug:
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 On travis-ci a test suite run seems to take about 18 minutes now.  I don't
 think travis-ci provides more than a single core to each job but using
 trial's `-j` feature (=2) nevertheless appears to speed up the run to
 around 12 minutes.  I suspect this is because the test suite spends a lot
 of time on I/O wait.  Telling trial to run the suite spread across two
 processes therefore results in better CPU utilization and results in this
 speedup.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2894>
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