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chrisvest/gist:906624

Created April 6, 2011 21:54
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Install Caliper http://code.google.com/p/caliper/
Clone https://github.com/chrisvest/stormpot
$ mvn package && ./benchmark stormpot.benchmark.PartitionSelect
Compare ModuloAtomicCount with ModuloIdentityHashNewObject
- you may subtract ModuloConst from both if you want, or
ModuloIdentityHashThread from ModuloIdentityHashNewObject,
to remove a bit of the overhead.
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There are probably special JIT heuristics that apply to Integer. Caliper currently have some shortcomings with regards to what parameters you can pass to the measuring JVMs - it would be interesting to see the new Object() results with Escape Analysis turned on. I reckon that would bring the ModuloHashNewObject results very close to that of ModuloHashBoxed.

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