Guys, Don't know if this has been done or attempted already, so I thought I'd ask. It strikes me that what we really need to tune Rails performance is a JRuby profiler, e. g., something that will tell us details in terms of time spent per (Ruby) method invocation so we can apply the old tuning adage: "Measure don't guess". It seems like we could do something fairly easily using the eventHook stuff we've been using for jruby-debug, maybe even using the jruby-debug code itself. My questions: Has this (or something like it) already been done for JRuby? Do other folks agree it would be useful? I could probably start looking at this some this week if we agree it's needed.
--Chris
