benchmarking color

colour_benchmarks.rb

require 'benchmark'
require 'gosu'

n = 1000000
a1 = [1.0, 1.0, 1.0, 1.0]
a255 = [255, 255, 255, 255]

class Color
  attr_accessor :red, :blue, :green, :alpha

  def initialize(r, g, b, a)
    @red, @blue, @red, @green = r, g, b, a
  end
end

class ColorWrap
  def red; @data[0]; end
  def red=(value); @data[0] = value; end

  def initialize(*args)
    @data = args
  end
end

gosu = Gosu::Color.new(255,255,255,255)
c = Color.new(1.0, 1.0, 1.0, 1.0)
cw = nil

Benchmark.bmbm do |bm|
  bm.report("float array#initialize") { n.times { a1 = [1.0, 1.0, 1.0, 1.0] } }
  bm.report("float array#[]") { n.times { a1[3] } }
  bm.report("float array#at") { n.times { a1.at(3) } }
  bm.report("float array#[]=0.0") { n.times { a1[3] = 0.0 } }
  
  bm.report("fixnum array#initialize") { n.times { a255 = [255, 255, 255, 255] } }
  bm.report("fixnum array#[]") { n.times { a255[3] } }
  bm.report("fixnum array#at") { n.times { a255.at(3) } }
  bm.report("fixnum array#[]=255") { n.times { a255[3] = 255 } }
 
  bm.report("float color#initialize") { n.times { c = Color.new(1.0, 1.0, 1.0, 1.0) } } 
  bm.report("float color#red") { n.times { c.red } }
  bm.report("float color#red=0.0") { n.times { c.red = 0.0 } }
  
  bm.report("float colorwrap#initialize") { n.times { cw = ColorWrap.new(1.0, 1.0, 1.0, 1.0) } } 
  bm.report("float colorwrap#red") { n.times { cw.red } }
  bm.report("float colorwrap#red=0.0") { n.times { cw.red = 0.0 } }
 
  bm.report("Gosu::Color#initialize") { n.times { gosu = Gosu::Color.new(255,255,255,255) } }  
  bm.report("Gosu::Color#red") { n.times { gosu.red } }
  bm.report("Gosu::Color#red=0") { n.times { gosu.red = 0 } }
end

1.9.2
user system total real
float array#initialize 0.343000 0.000000 0.343000 ( 0.356000)
float array#[] 0.125000 0.000000 0.125000 ( 0.121000)
float array#at 0.172000 0.000000 0.172000 ( 0.174000)
float array#[]=0.0 0.218000 0.000000 0.218000 ( 0.210000)

fixnum array#initialize      0.359000   0.000000   0.359000 (  0.365000)
fixnum array#[]              0.125000   0.000000   0.125000 (  0.123000)
fixnum array#at              0.187000   0.000000   0.187000 (  0.178000)
fixnum array#[]=255          0.203000   0.000000   0.203000 (  0.210000)

float color#initialize       0.842000   0.000000   0.842000 (  0.856000)
float color#red              0.172000   0.000000   0.172000 (  0.172000)
float color#red=0.0          0.187000   0.000000   0.187000 (  0.183000)

float colorwrap#initialize   0.780000   0.000000   0.780000 (  0.779000)
float colorwrap#red          0.218000   0.000000   0.218000 (  0.218000)
float colorwrap#red=0.0      0.297000   0.000000   0.297000 (  0.295000)

Gosu::Color#initialize       2.589000   0.015000   2.604000 (  2.611000)
Gosu::Color#red              0.187000   0.000000   0.187000 (  0.195000)
Gosu::Color#red=0            0.266000   0.000000   0.266000 (  0.261000)

1.8.7
user system total real
float array#initialize 0.561000 0.000000 0.561000 ( 0.559000)
float array#[] 0.234000 0.000000 0.234000 ( 0.234000)
float array#at 0.234000 0.000000 0.234000 ( 0.231000)
float array#[]=0.0 0.265000 0.000000 0.265000 ( 0.261000)

fixnum array#initialize      0.546000   0.000000   0.546000 (  0.557000)
fixnum array#[]              0.218000   0.000000   0.218000 (  0.231000)
fixnum array#at              0.234000   0.000000   0.234000 (  0.229000)
fixnum array#[]=255          0.265000   0.000000   0.265000 (  0.256000)

float color#initialize       2.761000   0.062000   2.823000 (  2.821000)
float color#red              0.202000   0.000000   0.202000 (  0.199000)
float color#red=0.0          0.234000   0.000000   0.234000 (  0.247000)

float colorwrap#initialize   1.887000   0.000000   1.887000 (  1.890000)
float colorwrap#red          0.421000   0.000000   0.421000 (  0.425000)
float colorwrap#red=0.0      0.514000   0.000000   0.514000 (  0.521000)

Gosu::Color#initialize       3.526000   0.047000   3.573000 (  3.569000)
Gosu::Color#red              0.219000   0.000000   0.219000 (  0.208000)
Gosu::Color#red=0            0.296000   0.000000   0.296000 (  0.291000)