[tahoe-dev] [tahoe-lafs] #329: dirnodes could cache encrypted/serialized entries for speed

[tahoe-lafs]

#329: dirnodes could cache encrypted/serialized entries for speed
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 Reporter:  warner         |           Owner:  kevan    
     Type:  enhancement    |          Status:  new      
 Priority:  minor          |       Milestone:  undecided
Component:  code-dirnodes  |         Version:  0.8.0    
 Keywords:  dirnode        |   Launchpad_bug:           
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Comment(by kevan):

 Okay. Given that, do you think that the other tests in
 {{{test_unpack_and_pack_behavior()}}} are going to be enough?

 I've finished doing a few things.
   * I've changed the tests for {{{_pack_contents}}} and
 {{{_unpack_contents}}} in {{{test_dirnode.py}}} to not check the output of
 {{{_pack_contents}}} for equality, since that will always fail at the
 moment. I've also moved a misplaced comment.
   * I've added tests for {{{CachingDict}}}, the data structure described
 by warner above (cool idea, by the way).
   * I've added an implementation of {{{CachingDict}}} to {{{dirnode.py}}}.
 It basically does what warner suggested that it do.
   * I've changed {{{_pack_contents}}}, {{{_unpack_contents}}}, and
 {{{_create}}} to use {{{CachingDict}}}s instead of {{{dict}}}s.

 With these done (tests.txt, dict.txt, optimizations.txt applied),
 {{{python setup.py test}}} passes on my machine.

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Ticket URL: <http://allmydata.org/trac/tahoe/ticket/329#comment:15>
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