Not appear Array#<< result.

[SpringMT]

I got the profile below script.
https://gist.github.com/SpringMT/8068584

When use profile, Array#<< result appeared.
https://gist.github.com/SpringMT/8068598

However when use ruby-prof, Array#<< result didn't appear.
https://gist.github.com/SpringMT/8068605

I use ruby 2.0.0p353 and ruby-prof 0.13.1.

[skaes]

The discrepancy is caused by the ruby byte code compiler and the way trace events are generated.

For some method invocations, ruby generates shorter byte code. << is one of those methods. The code path in the interpreter does not generate trace events for optimized calls.

The profiler you load using -r profile, gets around these limitations by setting a compile flag to not use the optimized method calls but to generate the default code sequence (which does generate trace events when run).

The following option settings can be used to require unoptimized code generation:

RubyVM::InstructionSequence.compile_option = {
      :trace_instruction => true,
      :specialized_instruction => false
}

[SpringMT]

👍

I add below code in bin/ruby-prof

RubyVM::InstructionSequence.compile_option = {
  :trace_instruction => true,
  :specialized_instruction => false
}

And I run the code (https://gist.github.com/SpringMT/8068584).

Appear Array#<< result !
https://gist.github.com/SpringMT/8098996

Thank you!

[skaes]

Turns out that ruby-prof was already trying to mimic profiler, but it used the wrong constant for the ruby vm (VM instead of RubyVM).