Java profiling - how can I get a method by method analysis of my application?

Question

I want to run my Java app and for a given workload be able to see:

• how many times a given function was called
• how expensive each function call is in

Answer 1

Simplest approach for a program running in java 6 from Sun is to use the jvisualvm program in the jdk. Allows you to attach and profile without any special setup.