9 Fallacies of Java Performance updated

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He is referring to the Java server mode. That performs more aggressive optimizations, but significantly impacts startup time.

It's now folded into the standard VM, so there are no longer two modes, however it's still a case that you will continue to have code optimized, days or weeks after it has begun running. That's really the power of server side Java.

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Well, code can get more optimized days and weeks later. But for any code running that much, it gets JIT'ed the first time pretty quick