Ruby String Matching Benchmark

benchmark.rb

require 'benchmark'
require 'securerandom'

words = []

# generate list of random "words"
10_000.times.map do
  words << SecureRandom.hex
end

# create string to compare them to.
# since it is a random hash based off time, it will never match
string = SecureRandom.hex

# compare words one at a time in the array to string
puts Benchmark.measure {
  words.any? { |word| string.include?(word) }
}
# 0.000880

# compare with string using regex
puts Benchmark.measure {
  regex = /#{words.join('|')}/
  regex === string
}
# 0.033893

# compare with regex premade
regex = /#{words.join('|')}/
puts Benchmark.measure {
  regex === string
}
# 0.001580