Objects mode not collecting data? about rack-perftools_profiler HOT 3 CLOSED

That error means that the profiler has not collected any data because there were too few objects created, but I would think that an action that is taking long would generate a ton of objects though.

Can you see if the problem is in your installation of perftools.rb on that version of REE? Try the following code using REE-1.8.7-2011.03

#objects.rb
require 'perftools'

PerfTools::CpuProfiler.start("/tmp/objects_profile") do
  1_000_000.times{ Array.new(10) }
end

CPUPROFILE_OBJECTS=1 ruby objects.rb
pprof.rb --pdf /tmp/objects_profile > /tmp/objects_profile.pdf && open /tmp/objects_profile.pdf

That generates a graph on my machine. If that doesn't work for you, then it looks like a bug in perftools.rb. If it does work, please let me know and I'll dig in further!

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@bhb thanks for the test case! It confirms that the issue is with perftools.rb... tmm1/perftools.rb#44 . In the meantime, I'm going to try some other rubies.

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No worries. Happy to help!

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