You must have missed this part: "Compared to JRuby on Java 6, JRuby on Java 7 wi... | Hacker News

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pdhborges on Dec 20, 2011 | parent | context | favorite | on: Massive Ruby speed boost with JRuby and Java 7.

You must have missed this part:

"Compared to JRuby on Java 6, JRuby on Java 7 without invokedynamic is around 25% faster, and JRuby with invokedynamic is nearly 3 times faster."

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