[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2228: add directory operations to performance.rst

[Tahoe-LAFS]

#2228: add directory operations to performance.rst
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 Reporter:  zooko                         |          Owner:  daira
     Type:  defect                        |         Status:  new
 Priority:  normal                        |      Milestone:  undecided
Component:  unknown                       |        Version:  1.10.0
 Keywords:  docs performance directories  |  Launchpad Bug:
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 [source:docs/performance.rst] lacks an explanation of the performance of
 directories.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2228>
Tahoe-LAFS <https://Tahoe-LAFS.org>
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