title: Java Instrumentation - any performance degradation?
body: <p>Does using <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/instrument/Instrumentation.html" rel="nofollow">Java Instrumentation</a> decrease the performance of the JVM running it in any way? I'm using it for getting the (shallow) size of an object, and I'm wondering whether it affects the performance.</p>