Measure and Benchmark Time for Ruby Methods

Question

How can i measure the time taken by a method and the individual statements in that method in Ruby. If you see the below method i want to measure the total time taken by the meth

Answer 1

Many of the answers suggest the use of Time.now. But it is worth being aware that Time.now can change. System clocks can drift and might get corrected by the system's administrator or via NTP. It is therefore possible for Time.now to jump forward or back and give your benchmarking inaccurate results.

A better solution is to use the operating system's monotonic clock, which is always moving forward. Ruby 2.1 and above give access to this via:

start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
# code to time
finish = Process.clock_gettime(Process::CLOCK_MONOTONIC)
diff = finish - start # gets time is seconds as a float

You can read more details here. Also you can see popular Ruby project, Sidekiq, made the switch to monotonic clock.