[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2226: add doc about literal caps in performance.rst

[Tahoe-LAFS]

#2226: add doc about literal caps in performance.rst
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     Reporter:  zooko          |      Owner:  marlowe
         Type:  defect         |     Status:  new
     Priority:  normal         |  Milestone:  undecided
    Component:  documentation  |    Version:  1.10.0
   Resolution:                 |   Keywords:  docs performance lit
Launchpad Bug:                 |
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Comment (by zooko):

 Replying to [comment:1 daira]:
 > I don't think the literal optimization changes any asymptotic costs,
 does it?

 I think of [source:docs/performance.rst] as supposed to tell you "What you
 need to know" about performance, not only the asymptotic costs. My attempt
 at answering that assumed that the asymptotic costs were often "What you
 need to know", but sometimes you need to know more.

 Oh, and actually the literal optimization totally *does* change the
 asymptotic costs of some things. For example, the cost in network usage to
 upload N files of 200 bytes each is O(N) network usage. The cost to upload
 N files of 55 bytes each is zero network usage.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2226#comment:2>
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