Ruby performance in Rails dev environment
I just finished comparing the performance of Ruby 1.8.7, 1.9.2, Jruby 1.5.6, 1.6.0.RC1 and Rubinius 1.2.0 in the Rails dev environment as you scale to larger and larger web apps. When you get up to several megs of code you can get a 5x or larger difference in response time (3 seconds vs 15 seconds) between different ruby implementations.
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