Benchmark for hash methods

benchmark_between_if_array_max_or_hash_fetch.rb

require "rubygems"
require "benchmark"

params = {}
puts "with params = {}"
Benchmark.bm(16) do |x|
  x.report("with if-inline: ") { 1_000_000.times { params[:page] ? params[:page].to_i : 1 } }
  x.report("with max......: ") { 1_000_000.times { [params[:page].to_i, 1].max } }
  x.report("with or.......: ") { 1_000_000.times { (params[:page] || 1).to_i } }
  x.report("with fetch....: ") { 1_000_000.times { params.fetch(:page, 1).to_i } }
end

params = {:page => 2}
puts ""
puts "with params = {:page => 2}"

Benchmark.bm(16) do |x|
  x.report("with if-inline: ") { 1_000_000.times { params[:page] ? params[:page].to_i : 1 } }
  x.report("with max......: ") { 1_000_000.times { [params[:page].to_i, 1].max } }
  x.report("with or.......: ") { 1_000_000.times { (params[:page] || 1).to_i } }
  x.report("with fetch....: ") { 1_000_000.times { params.fetch(:page, 1).to_i } }
end


=begin
with params = {}
                      user     system      total        real
with if-inline:   2.450000   0.810000   3.260000 (  3.276888)
with max......:   9.440000   3.260000  12.700000 ( 12.739284)
with or.......:   2.630000   0.820000   3.450000 (  3.463129)
with fetch....:   2.430000   0.810000   3.240000 (  3.249659)

with params = {:page => 2}
                      user     system      total        real
with if-inline:   2.580000   0.810000   3.390000 (  3.397123)
with max......:   9.150000   3.230000  12.380000 ( 12.376683)
with or.......:   2.400000   0.800000   3.200000 (  3.211984)
with fetch....:   2.430000   0.810000   3.240000 (  3.232451)
=end