Ruby regex benchmark

regex_benchmark.rb

require "benchmark"

def test(benchmark, pattern, text, run)
  benchmark.report(text.length.to_s) do
    run.times do
      text = text.gsub(pattern, " ")
    end
  end
end
pattern = /[-_.0-9A-Za-z]+@[-_0-9A-Za-z]+[-_.0-9A-Za-z]+/

RUNS = 2000

Benchmark.bm(6) do |benchmark|
  test(benchmark, pattern, "abcdefgh" * 10, RUNS)
  test(benchmark, pattern, "abcdefgh" * 50, RUNS)
  test(benchmark, pattern, "abcdefgh" * 100, RUNS)
  test(benchmark, pattern, "abcdefgh" * 500, RUNS)
  test(benchmark, pattern, "abcdefgh" * 1000, RUNS)
  test(benchmark, pattern, "abcdefgh" * 5000, RUNS)
  test(benchmark, pattern, "abcdefgh" * 10000, RUNS)
  test(benchmark, pattern, "abcdefgh" * 50000, RUNS)
  test(benchmark, pattern, "abcdefgh" * 100000, RUNS)
end