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Talking head
GORUCO 2012

This presentation, by Pat Shaughnessy, is licensed under a Creative Commons Attribution ShareAlike 3.0
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In this micro talk, I'll review the basic theory behind hash functions and hash tables, show you the new internal data structures that Ruby 2.0 uses to save keys and values, and present some performance data that proves this optimization exists and how much time it will actually save you.

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