Question

Is it possible in Ruby/Rails to measure the actual execution time of a single thread, within a multi-threaded environment?

I am creating up to 10 threads at once, and I am currently calculating the elapsed time for each thread, but since the multiple threads are sharing the processor(s), there will be gaps in as they share resources. So my time is going to be more than actual.

@urls.each do |url|
  Thread.new do
    time = Time.now
    request = http.get(url)
    response_time = Time.now - time
  end
  ...
end

Answer 1

wycats has made a cool gem called ruby-prof that should help you. It supports profiling multiple threads simultaneously, including process time, cpu time, and wall time.