How do "modern JVMs" differ from older JVMs?

Posted by Lord Torgamus on Stack Overflow See other posts from Stack Overflow or by Lord Torgamus
Published on 2009-12-28T16:37:22Z Indexed on 2010/05/28 19:21 UTC
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Here's a phrase that I heard a lot throughout high school and university computer science classes:

"That's not an issue for modern JVMs."

Usually this would come up in discussions about overall performance or optimization strategies. It was always treated as a kind of magical final answer, though, as if it makes issues no longer worth thinking about. And that just leads me to wonder: what are the differences between the prototypical "modern JVM" and older JVMs, really?

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