match versus =~.rb

gistfile1.rb

require 'benchmark'

@string = "this is a long string that I want 123 to appear in"

Benchmark.bmbm(6) do |x|
  x.report("String#match") do
    100_000.times do
      @string.match(/123/)
    end
  end

  x.report("String#=~") do
    100_000.times do
      @string =~ /123/
    end
  end
  
  x.report("Regexp#match") do
    100_000.times do
      /123/.match(@string)
    end
  end

  x.report("Regexp#=~") do
    100_000.times do
      /123/ =~ @string
    end
  end
end

# Rehearsal ------------------------------------------------
# String#match   0.170000   0.010000   0.180000 (  0.175012)
# String#=~      0.050000   0.000000   0.050000 (  0.045737)
# Regexp#match   0.160000   0.000000   0.160000 (  0.159869)
# Regexp#=~      0.040000   0.000000   0.040000 (  0.045148)
# --------------------------------------- total: 0.430000sec
# 
#                    user     system      total        real
# String#match   0.170000   0.000000   0.170000 (  0.165692)
# String#=~      0.040000   0.000000   0.040000 (  0.045257)
# Regexp#match   0.160000   0.000000   0.160000 (  0.154075)
# Regexp#=~      0.040000   0.000000   0.040000 (  0.044705)
# 
# Total: 82 samples
#       35  42.7%  42.7%       35  42.7% Regexp#match
#       25  30.5%  73.2%       60  73.2% Integer#times
#       21  25.6%  98.8%       21  25.6% garbage_collector
#        1   1.2% 100.0%        1   1.2% Process.times
#        0   0.0% 100.0%       61  74.4% Benchmark#bmbm
#        0   0.0% 100.0%       61  74.4% Benchmark#measure
#        0   0.0% 100.0%        1   1.2% Module#times
#        0   0.0% 100.0%       18  22.0% String#match