问题:

I'd like to profile my JRuby app. For MRI I always use ruby-prof, but I don't think this works on JRuby. I don't want to use a Java-profiler, because it won't give me the ruby line numbers.

Is there a jruby-prof?

回答1:

JRuby 1.5.5 includes a decent --profile command line flag.

Use it like this:

jruby --profile -S <script> <args>

回答2:

Check out Daniel Lucraft's new jruby-prof

回答3:

http://www.ruby-forum.com/topic/166247#734017

回答4:

We have never received a request for line numbers because that is typically only ever used when performing call stack sampling but I would see whether we can turn this on as an option. But for the most part you will not have to work because our automatic hotspot detection and extensible metering solutions would find the issue whether in the ruby code or the jruby implementation.

archive.org: http://williamlouth.wordpress.com/2009/08/05/the-fastest-ruby-profiler-is-a-java-profiler/