From: Intransition <transfire@...>
Date: 2010-10-07T13:28:36+09:00
Subject: Benchmarks Project and example for `||=`

Has anyone ever put together a suite of benchmarks that simply measure
interesting Ruby practices? For example, here is a comparison of using
||= vs not using it.

  n = 1000000

  puts "#{n} Times"

  t = Time.now

  @b = :b
  n.times do
    @b
  end

  puts "Simple Read : #{Time.now - t} seconds"

  t = Time.now

  n.times do
    @a ||= :a
  end

  puts "  Or Equals : #{Time.now - t} seconds"

On `ruby 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux]`:

  1000000 Times
  Simple Read : 0.395487 seconds
    Or Equals : 0.508428 seconds

On `ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]`:

  1000000 Times
  Simple Read : 0.121280356 seconds
    Or Equals : 0.183629043 seconds

Might be an interesting project.