gist: 120414 - string benchmarks in MRI- GitHub


  
    
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              # GC.disable
require 'benchmark'
 
Constant = 'abc'.freeze
 
Benchmark.bm(30) do |b|
  b.report('baseline') do
    var = 'abc'
    5_000_000.times{ var == var }
  end
 
  b.report('constant lookup') do
    5_000_000.times{ Constant == Constant }
  end
 
  b.report('one inline string') do
    var = 'abc'
    5_000_000.times{ 'abc' == var }
  end
 
  b.report('inline string + constant lookup') do
    5_000_000.times{ 'abc' == Constant }
  end
 
  b.report('two inline strings') do
    5_000_000.times{ 'abc' == 'abc' }
  end
end
 
__END__
 
                                    user     system      total        real
baseline                        2.350000   0.010000   2.360000 (  2.365716)
constant lookup                 2.760000   0.000000   2.760000 (  2.775171)
one inline string               3.270000   0.010000   3.280000 (  3.288727)
inline string + constant lookup 3.540000   0.020000   3.560000 (  3.592176)
two inline strings              4.040000   0.020000   4.060000 (  4.093472)
Description:	string benchmarks in MRI
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