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Re:Vert.x (JVM async) vs Node.js Http benchmarks results by IsaacSchlueter on Wednesday May 09, 2012 @02:38PM (#3949920)
Re:Vert.x (JVM async) vs Node.js Http benchmarks results by prospero on Thursday May 10, 2012 @12:57AM (#3951929)
Netty has support for zero-copy file responses, I imagine that's at least a large part of the performance discrepancy.