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"Massive" in this case is terribly subjective. I think the typical definition is concurrency between 10k and 50k. Whereas when we (at Urban Airship) wanted to hit 500k, the only reasonable way to do that without resorting to pure C was by using the JVM.

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It depends what your clients are doing. I've written perl servers (using epoll) that can cope with 300k concurrent connections, as long as they're not all talking at once. I've written perl servers coping with 50k concurrent connections where they are all talking at once too. And v8 is MUCH faster than Perl.

And slower than the JVM

Meh, sure basic operations are always going to be slower due to lack of type information, but for most work it's going to be pretty close to the JVM in terms of I/O, database access, etc. For compute specific tasks, sure it may not be the right tool for the job.

I'll be that clojure is faster and it isn't statically typed. I have far more confidence in the JVM handling heavy load that V8 which wasn't designed as a server side technology.

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