Open Source Java Profilers

Question

What can you guys recommend to use with Java?

Only requirement is it should be open source, or has not too expensive academic licence .

Answer 1

Java Mission Control, it's free to use for development and it integrates with Eclipse. It has very low overhead (<1%) since it piggybacks on the data the JVM is gathering anyway.

It's very easy to use and it can also give a lot information you typically won't find in other profiling tools, e.g. latency profiling, online memory inspection, detailed gc statistics

Answer 2

Ah. Netbeans Profiler, developer.com's "Product of the Year" winner, in 2009.

Answer 3

you've got a list here (listing them below, in-case link gets broken)

• JMemProf
• JMP
• DrMem
• JTreeProfiler
• NetBeans Profiler
• JAMon API
• JBoss Profiler
• MessAdmin
• InfraRED
• TomcatProbe
• Java Interactive Profiler (JIP)
• Profiler4j
• Stopwatch
• JMeasurement
• DJProf
• TIJmp
• Allmon
• Appspy
• EurekaJ
• japex
• OKTECH Profiler
• Perf4j

Answer 4

If you are looking for a no-frills, easy to use open source profiler, you may want to take a look at Jip (Java Interactive Profiler). It's published under a BSD license. I found it to be quite useful for small programs. At least, the results it gives are way more easy to understand than hprofs output.

Answer 5

This is quick, dirty, and very effective: just take a few thread dumps, or pause the program several times, and look at the stack traces.

Answer 6

Netbeans IDE includes a free profiler.

Also, if I remember correctly, the academic license for JProfiler is (relatively) inexpensive.