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server vs client JVM: is server faster? (Read 875 times)
Dan_Olner
server vs client JVM: is server faster?
Aug 6th, 2008, 5:12pm  
Hello

I've just been testing some code with simple benchmarks (er... random looped method calls, mainly) for running the server JVM rather than the client, as described in this now very old site -

http://kano.net/javabench/

For me, the server JVM is averaging about 10% faster than client. I'm wondering: presumably the same speed gains would help Processing be as fast as possible? Or are there downsides (e.g. the server JVM hogs more memory, for example). At any rate, might it be worth having an option in Processing to choose client or server JVM to get a little extra oomph?

I've been using Processing both via Netbeans with java 1.6.0_2 and with the Processing editor. The latter currently ships with 1.4, yes? It doesn't seem to have the server JVM included. AFAIK it doesn't affect anything else except memory load...?

Cheers,

Dan
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fry
Re: server vs client JVM: is server faster?
Reply #1 - Aug 15th, 2008, 4:40pm  
You'll get different results depending on the machine, OS, number of processors, what type of things you're doing in the sketch, etc.

In the past, for instance, the server VM had atrocious garbage collection (very bad for interactive applets), though I think maybe that's been improved. When a machine is multiprocessor, I believe that the server VM is employed automatically to make use of both processors. (Or maybe that's on the Mac? I don't recall exactly).

At any rate, it's inconclusive. If you want to see an option, file it as an 'enhancement' in the bugs db.
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