Regexp VS start_with?

bench.rb

require 'benchmark/ips'
require 'uri'

str = 'https://www.facebook.com/'

Benchmark.ips do |x|
  x.report('start_with?') { str.start_with?('https://', 'http://') }
  x.report('match?') { str.match?(URI::regexp) }
  x.report('=~') { str =~ URI::regexp }

  x.compare!
end

Warming up --------------------------------------
         start_with?   210.748k i/100ms
              match?    65.575k i/100ms
                  =~    59.756k i/100ms
Calculating -------------------------------------
         start_with?      6.592M (± 9.8%) i/s -     32.666M in   5.018034s
              match?    879.694k (±10.1%) i/s -      4.394M in   5.060208s
                  =~    803.385k (±14.1%) i/s -      3.944M in   5.064482s

Comparison:
         start_with?:  6591721.7 i/s
              match?:   879694.5 i/s - 7.49x  slower
                  =~:   803384.5 i/s - 8.20x  slower