[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):

 I've run the benchmarks, and am attaching the results.

 To get the {{{unmodifed_results}}} file, I simply ran
 {{{bench_dirnode.py}}} against an unmodified checkout from trunk.

 To get the {{{modified_results}}} file, I needed to change a call to
 {{{dict}}} in {{{bench_dirnode.py}}} to refer to {{{dirnode.CachingDict}}}
 (otherwise {{{_pack_contents}}} raises an {{{AssertionError}}}). I'm
 attaching a patch that duplicates that change. I then applied
 {{{dict.txt}}}, {{{optimizations.txt}}}, and {{{tests.txt}}} to an
 otherwise unmodified source tree, and ran {{{bench_dirnode.py}}} against
 it.

 The results seem to favor the optimized implementation.

 I'm also updating dict.txt again -- hopefully for the last time -- to fix
 another *args related issue that I found.

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Ticket URL: <http://allmydata.org/trac/tahoe/ticket/329#comment:20>
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