Bench: Hanami::Utils::String.transform w/ and w/o caching

bench.rb

#!/usr/bin/env ruby
require 'benchmark/ips'
require 'hanami/utils/string'

INPUT = "Hanami::Utils::String".freeze

Benchmark.ips do |x|
  x.report('uncached base')             { Hanami::Utils::String.transform(INPUT, :underscore, :classify) }
  x.report('uncached args')             { Hanami::Utils::String.transform(INPUT, [:rsub, %r{/}, "#"]) }
  x.report('uncached from string')      { Hanami::Utils::String.transform(INPUT, :demodulize, :downcase) }
  x.report('uncached from string args') { Hanami::Utils::String.transform(INPUT, [:gsub, /[aeiouy]/, "*"], :namespace) }

  x.report('cached base')             { Hanami::Utils::String.cached_transform(INPUT, :underscore, :classify) }
  x.report('cached args')             { Hanami::Utils::String.cached_transform(INPUT, [:rsub, %r{/}, "#"]) }
  x.report('cached from string')      { Hanami::Utils::String.cached_transform(INPUT, :demodulize, :downcase) }
  x.report('cached from string args') { Hanami::Utils::String.cached_transform(INPUT, [:gsub, /[aeiouy]/, "*"], :namespace) }

  x.compare!
end

__END__
Results:

  Warming up --------------------------------------
         uncached base     3.812k i/100ms
           cached base     5.267k i/100ms
  Calculating -------------------------------------
         uncached base     41.214k (± 3.7%) i/s -    205.848k in   5.001564s
           cached base     54.607k (± 3.5%) i/s -    273.884k in   5.021958s

  Comparison:
           cached base:    54607.0 i/s
         uncached base:    41213.7 i/s - 1.32x  slower



  Warming up --------------------------------------
         uncached args    21.288k i/100ms
           cached args    34.579k i/100ms
  Calculating -------------------------------------
         uncached args    239.752k (± 4.3%) i/s -      1.213M in   5.070848s
           cached args    390.661k (± 3.6%) i/s -      1.971M in   5.052042s

  Comparison:
           cached args:   390661.1 i/s
         uncached args:   239752.4 i/s - 1.63x  slower



  Warming up --------------------------------------
    uncached from string    10.526k i/100ms
      cached from string    32.011k i/100ms
  Calculating -------------------------------------
    uncached from string    110.346k (± 4.2%) i/s -    557.878k in   5.065298s
      cached from string    356.957k (± 3.4%) i/s -      1.793M in   5.027938s

  Comparison:
      cached from string:   356956.9 i/s
    uncached from string:   110346.2 i/s - 3.23x  slower



  Warming up --------------------------------------
    uncached from string args 7.387k i/100ms
    cached from string args 14.722k i/100ms
  Calculating -------------------------------------
    uncached from string args 77.854k (± 3.5%) i/s -    391.511k in   5.034957s
    cached from string args 156.388k (± 3.1%) i/s -    794.988k in   5.088173s

  Comparison:
    cached from string args:   156388.1 i/s
    uncached from string args:    77854.1 i/s - 2.01x  slower

Ruby:

    ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-darwin15]

Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro12,1
      Processor Name: Intel Core i7
      Processor Speed: 3,1 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 4 MB
      Memory: 16 GB
      Boot ROM Version: MBP121.0167.B33
      SMC Version (system): 2.28f7

Software:

    System Software Overview:

      System Version: macOS 10.12.6 (16G29)
      Kernel Version: Darwin 16.7.0
      Time since boot: 9 days 3:13