Benchmark shamazing refactors

benchmark.rb

require 'shamazing'
require 'benchmark/ips'

sha = '9c2cddfaedaea9689a22e376aa20191041554fe8'

class Shamazing
  def self.refactored(sha)
    sha.
      downcase.
      scan(/[a-f]+/).
      max_by(&:length)
  end

  def self.downcase_last(sha)
    sha.
      scan(/[a-f]+/i).
      sort{|a,b| b.length <=> a.length}.
      first.
      downcase
  end

  def self.combined(sha)
    sha.
      scan(/[a-f]+/i).
      max_by(&:length).
      downcase
  end
end

Benchmark.ips do |x|
  x.report('original') { Shamazing.string(sha) }
  x.report('downcase last') { Shamazing.downcase_last(sha) }
  x.report('max_by') { Shamazing.refactored(sha) }
  x.report('dc last & max_by') { Shamazing.combined(sha) }
end

__END__
Calculating -------------------------------------
            original      7082 i/100ms
       downcase last      7356 i/100ms
              max_by      7674 i/100ms
    dc last & max_by      8031 i/100ms
-------------------------------------------------
            original    86754.0 (±1.8%) i/s -     439084 in   5.062890s
       downcase last    90368.8 (±2.0%) i/s -     456072 in   5.048858s
              max_by    93838.9 (±2.5%) i/s -     475788 in   5.073710s
    dc last & max_by    97433.5 (±1.4%) i/s -     489891 in   5.028998s