Measuring Java execution time, memory usage and CPU load for a code segment

Question

For a particular segment of Java code, I\'d like to measure:

• Execution time (most likely thread execution time)

Answer 1

With the ThreadMXBean you can get CPU usage of individual threads and cpu time consumed rather than elapse time which may be useful.

However, its often simpler to use a profiler as this process often generates a lot of data and you need a good visualisation tool to see what is going on.

I use Yourkit as I find it easier to solve problems that other profilers I have used. I also use the builtin hprof as this can give you a different view on the profile of your application (but not as useful)