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This is a class in 1.9 MRI
GC::Profiler.enable # ... stuff GC::Profiler.report # outputs to stdout # or report = GC::Profiler.result # a is set to a verbose ascii string GC::Profiler.disable # stop it </code> Note also the existence of GC.count (number of times it has run). Note that you can get a more report by setting a compiler flag <pre>GC_PROFILE_MORE_DETAIL=1
Note that the outputs "invoke Time(sec)" is actually the sum of user cpu time until that invoke occurred—i.e. a sleep 1 will result it is increasing by 0, but a busy loop for one second will result in it increasing by 1.