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  Clip slower on 64-bit JRE's  (Read 2940 times)
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Offline BoBear2681

JGO Coder

Medals: 19

« Posted 2010-06-16 11:54:28 »

HI everybody,

I've been playing javax.sound.sampled.Clips like this:

public void play(final String key) {
//new Thread() { @Override public void run() {
   Clip clip = clips.get(key);
   if (clip!=null) {

I'm testing on a Core 2 Duo, 4GHz, so the machine is plenty fast.  My game is running at 30 fps, and I'm noticing a big performance difference when using a 32-bit JRE vs. a 64-bit one.

I'm currently playing a sound each time the user presses a key.  If the user holds down the key, that sound plays repeatedly, as quickly as possible.  When running on a 32-bit JRE, this works fine, and the game stays at a solid 30 fps.  When running on a 64-bit JRE, however, performance drops to 15 fps.  I tested with a 1.5 and 1.6 JRE for both levels of bitness, and the result is the same.

Any idea what's causing this?  Am I doing something wrong?  I notice that when I run the sound effect in a thread (using the commented out lines), I don't have this performance drop in 64-bit.  Is this a bad workaround - launching (possibly) 30 threads per second, albeit short-lived threads?
Offline sproket

Junior Devvie

Medals: 1

« Reply #1 - Posted 2010-06-21 22:01:51 »

Hmm. I see something similar as well. Your best bet would be to post on the java forums at sun/oracle. They have a section.

Offline BoBear2681

JGO Coder

Medals: 19

« Reply #2 - Posted 2010-06-23 16:54:48 »

Aye, I just thought I'd try here first since the folks here are pretty smart and responses often come pretty quickly.  I'll post over there and if I get a response I'll post the solution back here.
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