A micro-benchmark of Ruby's `String#include? || String#include?` vs. `String#=~ /[...]/`

benchmark.rb

#!/usr/bin/env ruby

require 'benchmark'

Benchmark.bm(20) do |b|
  n = 10_000

  string = ('A' * n) + 'x'

  b.report('String#include?(...))') do
    n.times do
      string.include?(',') || string.include?('x')
    end
  end

  b.report('String=~ /[...]/') do
    n.times do
      string =~ /[,x]/
    end
  end
end

gistfile1.txt

                           user     system      total        real
String#include?(...))  0.003851   0.000960   0.004811 (  0.004902)
String=~ /[...]/       0.087985   0.000000   0.087985 (  0.088354)