Rails Performance Profile Reports 0 MB -

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i'm experiencing unexpected behavior when try performance testing. it's reporting 0 mb memory though millions of objects created in run. while profiler running, activity monitor reporting memory usage in 100s of mb.

here details local environment:

  • os: mac os 10.9.5
  • hardware: macbook air
  • ruby: 2.2.2 (rvm)
  • rails: 4.1.11 using
  • rails-perftest & ruby-prof gems

any idea why i'm seeing 0 memory usage?

$ rails_env=development perftest profiler 'queue.last.refill' -m process_time,memory,objects,gc_runs,gc_time run options: --seed 30468  # running:  profilertest#test_queue_last_refill (10.00 sec warmup)         process_time: 62.34 sec               memory: 0 bytes              objects: 3,903,787              gc_runs: 3              gc_time: 0 ms .  finished in 239.965591s, 0.0042 runs/s, 0.0000 assertions/s.

you need gc patched mri. need require ruby-prof. check documentation here: http://guides.rubyonrails.org/v3.2.13/performance_testing.html#installing-gc-patched-mri


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