Clocker

A simple RubyGem that reports how long a specific Ruby command or block of code takes to run.

Simply run clocker followed by a command or block of code. Add an -m before the command or block to print out start and end times.

Ex. 1

$ clocker "puts 'hi'"
hi
Clocked at 0 mins, 0 secs, 0 ms

Ex. 2

$ clocker "2.times { puts 'hello world'; sleep(0.6) }"
hello world
hello world

Clocked at 0 mins, 1 secs, and 210 ms

Ex. 3

$ clocker -m "1.upto(5) { |i| print i+1; sleep(0.4) }"
start: 2015-08-18 16:16:47 -0700
23456
ended: 2015-08-18 16:16:49 -0700

Clocked at 0 mins, 2 secs, and 12 ms

Add this line to your application's Gemfile:

gem 'clocker'

And then execute:

$ bundle

Or install it yourself as:

$ gem install clocker

Sample code block:

>> clocker = Clocker.new
>> clocker.clock do
>>  # code here
>> end

By default, clocker will not print out the start time before the command|block, or the end time after the command|block, unless you pass the instance show_messages: true.

>> c1 = Clocker.new
>> duration = c1.clock do
>>  3.times { print 'c1'; sleep(1) }
>> end
>> puts
>> puts duration

c1c1c1
{:mins=>0, :secs=>3, :ms=>13}

>> c2 = Clocker.new(show_messages: true)
>> duration = c2.clock do
>>  3.times { print 'c2'; sleep(1) }
>> end
>> puts duration

start: 2015-08-18 16:07:17 -0700
c2c2c2
ended: 2015-08-18 16:07:20 -0700
{:mins=>0, :secs=>3, :ms=>14}

Bug reports and pull requests are welcome on GitHub at https://github.com/michaelchadwick/clocker.

The gem is available as open source under the terms of the MIT License.