Performance profiler - now for the Mac!
By Tor Norbye on Dec 01, 2005
Milestone 11 of the NetBeans Performance Profiler was released today. It's mostly a bug fix release, but it sports one big new feature: Support for Apple OSX! This is a big deal. The NetBeans Profiler is based on JFluid, a new approach to performance profiling. Rather than using the standard JVM performance interface, it used a special modification of the VM to do its profiling more accurately. Because of this, you had to download special VMs to run your application - and of course, those modified VMs did not include OSX (where the VM is provided by Apple rather than Sun).
The JFluid hotspot modifications have been integrated into the JDK. As of JDK 5 update 4 (or thereabouts) you can use a standard JDK with the profiler and everything works beautifully. And I guess Apple's recent update to JDK 5 must have synced up to the codebase which includes the JFluid modifications, since the profiler now works.
The "What's New" document describes this feature as experimental - so of course I had to try it! It seemed to work well on my test case. I created a sample project (the Anagram sample that ships with NetBeans), then invoked the Profiler. After calibrating the timers I needed to restart profiling. From there everything went smoothly; I hit the GUI button a bunch of times, then clicked on the Take Snapshot button in the profiling panel. Voila! The result screen pops up letting me drill into both the hotspots and the overall cumulative time view.
Click on the screenshot for full size. And check out the Profiler Screenshots off the profiler main page; as you can see there are various telemetry views and other goodies there.
Very promising. If you're a Mac Java user, be sure to try it out and provide feedback and bug reports to the profiler team such that this feature is stabilized as quickly as possible!