# Copied from my benchmark_hell repo: github.com/sgonyea/benchmark_hell
require 'benchmark'
iters = 1000000
comp = "hello"
hello = "HelLo"
puts 'String#downcase == vs. String#casecmp'
Benchmark.bmbm do |x|
x.report('String#downcase1') do
iters.times.each do
hello.downcase == comp
end
end
x.report('String#downcase2') do
iters.times.each do
"HelLo".downcase == "hello"
end
end
x.report('String#downcase3') do
iters.times.each do
var = "HelLo"
var.downcase!
var == "hello"
end
end
x.report('casecmp1') do
iters.times.each do
hello.casecmp(comp).zero?
end
end
x.report('casecmp1-1') do
iters.times.each do
hello.casecmp(comp) == 0
end
end
x.report('casecmp2') do
iters.times.each do
"HelLo".casecmp(comp).zero?
end
end
x.report('casecmp2-1') do
iters.times.each do
"HelLo".casecmp(comp) == 0
end
end
end
=begin
rvm exec bash -c 'echo && echo $RUBY_VERSION && echo && ruby downcase-eq-eq_vs_casecmp.rb'
jruby-1.5.6
String#downcase == vs. String#casecmp
Rehearsal ----------------------------------------------------
String#downcase1 0.461000 0.000000 0.461000 ( 0.387000)
String#downcase2 0.269000 0.000000 0.269000 ( 0.269000)
String#downcase3 0.224000 0.000000 0.224000 ( 0.224000)
casecmp1 0.157000 0.000000 0.157000 ( 0.157000)
casecmp1-1 0.153000 0.000000 0.153000 ( 0.153000)
casecmp2 0.163000 0.000000 0.163000 ( 0.163000)
casecmp2-1 0.163000 0.000000 0.163000 ( 0.163000)
------------------------------------------- total: 1.590000sec
user system total real
String#downcase1 0.190000 0.000000 0.190000 ( 0.191000)
String#downcase2 0.225000 0.000000 0.225000 ( 0.225000)
String#downcase3 0.190000 0.000000 0.190000 ( 0.190000)
casecmp1 0.125000 0.000000 0.125000 ( 0.125000)
casecmp1-1 0.127000 0.000000 0.127000 ( 0.127000)
casecmp2 0.144000 0.000000 0.144000 ( 0.144000)
casecmp2-1 0.147000 0.000000 0.147000 ( 0.147000)
macruby-0.7.1
String#downcase == vs. String#casecmp
Rehearsal ----------------------------------------------------
String#downcase1 2.340000 0.040000 2.380000 ( 1.765141)
String#downcase2 5.510000 0.100000 5.610000 ( 3.893249)
String#downcase3 4.200000 0.080000 4.280000 ( 3.031621)
casecmp1 0.270000 0.000000 0.270000 ( 0.267613)
casecmp1-1 0.190000 0.000000 0.190000 ( 0.188848)
casecmp2 1.450000 0.020000 1.470000 ( 1.027956)
casecmp2-1 1.380000 0.030000 1.410000 ( 0.951474)
------------------------------------------ total: 15.610000sec
user system total real
String#downcase1 2.350000 0.040000 2.390000 ( 1.774292)
String#downcase2 5.890000 0.120000 6.010000 ( 4.214038)
String#downcase3 4.530000 0.090000 4.620000 ( 3.286059)
casecmp1 0.270000 0.000000 0.270000 ( 0.271119)
casecmp1-1 0.190000 0.000000 0.190000 ( 0.189462)
casecmp2 1.540000 0.030000 1.570000 ( 1.104751)
casecmp2-1 1.440000 0.030000 1.470000 ( 0.999689)
rbx-head
String#downcase == vs. String#casecmp
Rehearsal ----------------------------------------------------
String#downcase1 0.702746 0.005229 0.707975 ( 0.621969)
String#downcase2 0.701429 0.001617 0.703046 ( 0.691833)
String#downcase3 1.042835 0.002952 1.045787 ( 0.953992)
casecmp1 0.654571 0.002239 0.656810 ( 0.480158)
casecmp1-1 0.484706 0.001105 0.485811 ( 0.398601)
casecmp2 0.564140 0.001579 0.565719 ( 0.545332)
casecmp2-1 0.554889 0.001153 0.556042 ( 0.539569)
------------------------------------------- total: 4.721190sec
user system total real
String#downcase1 0.491199 0.001081 0.492280 ( 0.493727)
String#downcase2 0.631059 0.001018 0.632077 ( 0.629885)
String#downcase3 0.968867 0.002504 0.971371 ( 0.976734)
casecmp1 0.364496 0.000434 0.364930 ( 0.365262)
casecmp1-1 0.373140 0.000562 0.373702 ( 0.374136)
casecmp2 0.487644 0.001057 0.488701 ( 0.490302)
casecmp2-1 0.469868 0.001178 0.471046 ( 0.472220)
ruby-1.8.7-p330
String#downcase == vs. String#casecmp
Rehearsal ----------------------------------------------------
String#downcase1 0.780000 0.000000 0.780000 ( 0.783979)
String#downcase2 0.950000 0.000000 0.950000 ( 0.954109)
String#downcase3 0.960000 0.000000 0.960000 ( 0.960554)
casecmp1 0.440000 0.000000 0.440000 ( 0.442546)
casecmp1-1 0.490000 0.000000 0.490000 ( 0.487795)
casecmp2 0.530000 0.000000 0.530000 ( 0.535819)
casecmp2-1 0.570000 0.000000 0.570000 ( 0.574653)
------------------------------------------- total: 4.720000sec
user system total real
String#downcase1 0.780000 0.000000 0.780000 ( 0.780692)
String#downcase2 0.980000 0.010000 0.990000 ( 0.982925)
String#downcase3 0.960000 0.000000 0.960000 ( 0.961501)
casecmp1 0.440000 0.000000 0.440000 ( 0.444528)
casecmp1-1 0.490000 0.000000 0.490000 ( 0.487437)
casecmp2 0.540000 0.000000 0.540000 ( 0.537686)
casecmp2-1 0.570000 0.000000 0.570000 ( 0.574253)
ruby-1.9.2-p136
String#downcase == vs. String#casecmp
Rehearsal ----------------------------------------------------
String#downcase1 0.750000 0.000000 0.750000 ( 0.750523)
String#downcase2 1.190000 0.000000 1.190000 ( 1.193346)
String#downcase3 1.030000 0.010000 1.040000 ( 1.036435)
casecmp1 0.640000 0.000000 0.640000 ( 0.640327)
casecmp1-1 0.480000 0.000000 0.480000 ( 0.484709) # With all this crap running, some flukes pop out
casecmp2 0.820000 0.000000 0.820000 ( 0.822223)
casecmp2-1 0.660000 0.000000 0.660000 ( 0.664190)
------------------------------------------- total: 5.580000sec
user system total real
String#downcase1 0.760000 0.000000 0.760000 ( 0.759816)
String#downcase2 1.150000 0.010000 1.160000 ( 1.150792)
String#downcase3 1.000000 0.000000 1.000000 ( 1.005549)
casecmp1 0.650000 0.000000 0.650000 ( 0.644021)
casecmp1-1 0.490000 0.000000 0.490000 ( 0.494456)
casecmp2 0.820000 0.000000 0.820000 ( 0.817689)
casecmp2-1 0.680000 0.000000 0.680000 ( 0.685121)
=end