You can attempt to speed up LimeWire by enabling the JIT yourself. This can be done by opening up the file "LimeWire.lax" in any text editor. (LimeWire.lax can be found in the same folder that the LimeWire program is in.) Look for the line that reads:
lax.nl.macos.java.compiler=off
and insert a '#' before it, so it reads:
#lax.nl.macos.java.compiler=off

Then save the file and start up LimeWire.

I cannot guarantee that LimeWire will continue to work. But if it does, it will be a little faster. "You sir, are an absolute genius. I tried the above suggestion, it took about 15 seconds to do, and it works perfectly. Now my filesharing works perfectly, file verification and saving are much faster, and the whole program is more responsive. In my 8 or so years of using computers I have never seen anything that created such an improvement with so little effort. Thanks a lot. "