require 'benchmark'
iterations = 1_000_000

words = 'foo, bar, test, boo'.split(',').map(&:strip)
string = 'this is going foo be awesome~!'
Benchmark.bmbm do |bm|
  bm.report do
    iterations.times do
      words.any? { |s| string.include?(s) }
    end
  end

  bm.report do
    iterations.times do
      r = Regexp.union(*words)
      r === string
    end
  end
end
# Rehearsal ------------------------------------
#   0.800000   0.000000   0.800000 (  0.804023)
#   14.990000   0.020000  15.010000 ( 15.017372)
# -------------------------- total: 15.810000sec

#       user     system      total        real
#   0.820000   0.000000   0.820000 (  0.815677)
#   15.020000   0.020000  15.040000 ( 15.039478)

Benchmark.bmbm do |bm|
  bm.report do
    iterations.times do
      words = 'foo, bar, test, boo'.split(',').map(&:strip)
      string = 'this is going foo be awesome~!'
      words.any? { |s| string.include?(s) }
    end
  end

  bm.report do
    iterations.times do
      words = 'foo, bar, test, boo'.split(',').map(&:strip)
      string = 'this is going foo be awesome~!'
      r = Regexp.union(*words)
      r === string
    end
  end
end
# Rehearsal ------------------------------------
#   4.710000   0.010000   4.720000 (  4.711062)
#   20.080000   0.000000  20.080000 ( 20.085188)
# -------------------------- total: 24.800000sec

#       user     system      total        real
#   4.760000   0.000000   4.760000 (  4.765137)
#   20.130000   0.010000  20.140000 ( 20.142866)