Some performance issues to be investigated:
1. In earlier JDKs, the performance was> noticeably better when suspending
only one thread.
What is the difference in suspending/resuming all thread and one thread in JDK 1.5?
How costly is suspending/resuming before and after method invocation?
2. In some special cases 'ThreadReference.frameCount'
takes too much time. 12 calls take up to 8 seconds on 2.6GHz Pentium IV.
3. MethodEntryRequest and MethodExitRequest unreasonably slow down whole
performance. We use them to track calls to method in a particular class
or to any overriding methods. But it seems the performance slows down
for any method calls, not even to that particular class.
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