benchmark

#!/usr/bin/env ruby
$: << File.dirname(__FILE__)+'/lib'
require 'benchmark/ips'
require 'fast_blank'

class String
  # active support implementation
  def slow_blank?
    /\A[[:space:]]*\z/ === self
  end

  def new_slow_blank?
    empty? || !(/[[:^space:]]/ === self)
  end

  def ruby_24_blank?
    /\A[[:space:]]*\z/.match?(self)
  end
end

test_strings = [
  "",
  "\r\n\r\n  ",
  "this is a test",
  "   this is a longer test",
  "   this is a longer test
      this is a longer test
      this is a longer test
      this is a longer test
      this is a longer test"
]

$has_match = (//.respond_to? :match?)

test_strings.each do |s|
  raise "failed on #{s.inspect}" if s.blank? != s.slow_blank?
  raise "failed on #{s.inspect}" if s.blank? != s.new_slow_blank?
  if $has_match
    # disabled while //.match?"" returns nil (bug)
    # raise "failed on #{s.inspect}" if s.blank? != s.ruby_24_blank?
  end
end

test_strings.each do |s|
  puts "\n================== Test String Length: #{s.length} =================="
  Benchmark.ips do |x|
    x.report("Fast Blank") do |times|
      i = 0
      while i < times
        s.blank?
        i += 1
      end
    end

    x.report("Fast ActiveSupport") do |times|
      i = 0
      while i < times
        s.blank_as?
        i += 1
      end
    end

    x.report("Slow Blank") do |times|
      i = 0
      while i < times
        s.slow_blank?
        i += 1
      end
    end

    x.report("New Slow Blank") do |times|
      i = 0
      while i < times
        s.new_slow_blank?
        i += 1
      end
    end

    if $has_match
      x.report("Ruby 2.4 match?") do |times|
        i = 0
        while i < times
          s.ruby_24_blank?
          i += 1
        end
      end
    end

    x.compare!
  end
end

# ================== Test String Length: 0 ==================
# Calculating -------------------------------------
#           Fast Blank   113.770k i/100ms
#   Fast ActiveSupport   116.284k i/100ms
#           Slow Blank    46.705k i/100ms
#       New Slow Blank   112.101k i/100ms
#      Ruby 2.4 match?    93.092k i/100ms
# -------------------------------------------------
#           Fast Blank     18.535M (±11.0%) i/s -     91.357M
#   Fast ActiveSupport     18.789M (±10.4%) i/s -     92.795M
#           Slow Blank      1.022M (± 7.3%) i/s -      5.091M
#       New Slow Blank     19.926M (± 9.8%) i/s -     98.537M
#      Ruby 2.4 match?     10.868M (± 8.8%) i/s -     53.900M
#
# Comparison:
#       New Slow Blank: 19925554.0 i/s
#   Fast ActiveSupport: 18788918.1 i/s - 1.06x slower
#           Fast Blank: 18534902.4 i/s - 1.08x slower
#      Ruby 2.4 match?: 10868476.1 i/s - 1.83x slower
#           Slow Blank:  1021987.5 i/s - 19.50x slower
#
#
# ================== Test String Length: 6 ==================
# Calculating -------------------------------------
#           Fast Blank    96.829k i/100ms
#   Fast ActiveSupport   111.282k i/100ms
#           Slow Blank    44.464k i/100ms
#       New Slow Blank    68.832k i/100ms
#      Ruby 2.4 match?    76.882k i/100ms
# -------------------------------------------------
#           Fast Blank      8.746M (± 7.6%) i/s -     43.476M
#   Fast ActiveSupport      8.807M (± 7.5%) i/s -     43.845M
#           Slow Blank    865.704k (± 6.6%) i/s -      4.313M
#       New Slow Blank      2.394M (± 7.3%) i/s -     11.908M
#      Ruby 2.4 match?      4.498M (± 6.6%) i/s -     22.450M
#
# Comparison:
#   Fast ActiveSupport:  8807338.9 i/s
#           Fast Blank:  8745689.7 i/s - 1.01x slower
#      Ruby 2.4 match?:  4498359.7 i/s - 1.96x slower
#       New Slow Blank:  2394093.5 i/s - 3.68x slower
#           Slow Blank:   865704.4 i/s - 10.17x slower
#
#
# ================== Test String Length: 14 ==================
# Calculating -------------------------------------
#           Fast Blank   108.509k i/100ms
#   Fast ActiveSupport   112.127k i/100ms
#           Slow Blank    63.625k i/100ms
#       New Slow Blank    38.425k i/100ms
#      Ruby 2.4 match?    76.900k i/100ms
# -------------------------------------------------
#           Fast Blank     15.941M (± 9.0%) i/s -     78.886M
#   Fast ActiveSupport     16.571M (± 8.7%) i/s -     82.077M
#           Slow Blank      2.348M (± 9.9%) i/s -     11.643M
#       New Slow Blank    951.381k (± 5.2%) i/s -      4.765M
#      Ruby 2.4 match?      6.432M (± 5.5%) i/s -     32.067M
#
# Comparison:
#   Fast ActiveSupport: 16570765.1 i/s
#           Fast Blank: 15941098.1 i/s - 1.04x slower
#      Ruby 2.4 match?:  6432466.4 i/s - 2.58x slower
#           Slow Blank:  2348113.3 i/s - 7.06x slower
#       New Slow Blank:   951380.6 i/s - 17.42x slower
#
#
# ================== Test String Length: 24 ==================
# Calculating -------------------------------------
#           Fast Blank   113.828k i/100ms
#   Fast ActiveSupport   115.010k i/100ms
#           Slow Blank    69.520k i/100ms
#       New Slow Blank    43.616k i/100ms
#      Ruby 2.4 match?    70.745k i/100ms
# -------------------------------------------------
#           Fast Blank     10.181M (±10.0%) i/s -     50.312M
#   Fast ActiveSupport     10.704M (±10.3%) i/s -     52.905M
#           Slow Blank      2.000M (± 6.6%) i/s -     10.011M
#       New Slow Blank    910.198k (± 7.0%) i/s -      4.536M
#      Ruby 2.4 match?      4.125M (± 7.1%) i/s -     20.516M
#
# Comparison:
#   Fast ActiveSupport: 10703759.1 i/s
#           Fast Blank: 10180744.9 i/s - 1.05x slower
#      Ruby 2.4 match?:  4125002.8 i/s - 2.59x slower
#           Slow Blank:  2000197.5 i/s - 5.35x slower
#       New Slow Blank:   910198.2 i/s - 11.76x slower
#
#
# ================== Test String Length: 136 ==================
# Calculating -------------------------------------
#           Fast Blank   108.669k i/100ms
#   Fast ActiveSupport   113.360k i/100ms
#           Slow Blank    61.259k i/100ms
#       New Slow Blank    42.269k i/100ms
#      Ruby 2.4 match?    79.272k i/100ms
# -------------------------------------------------
#           Fast Blank     10.282M (±10.7%) i/s -     50.748M
#   Fast ActiveSupport     11.306M (± 8.0%) i/s -     56.113M
#           Slow Blank      2.122M (± 6.3%) i/s -     10.598M
#       New Slow Blank      1.037M (± 4.8%) i/s -      5.199M
#      Ruby 2.4 match?      4.419M (± 6.3%) i/s -     22.038M
#
# Comparison:
#   Fast ActiveSupport: 11305782.5 i/s
#           Fast Blank: 10281574.6 i/s - 1.10x slower
#      Ruby 2.4 match?:  4419110.0 i/s - 2.56x slower
#           Slow Blank:  2121790.2 i/s - 5.33x slower
#       New Slow Blank:  1036703.8 i/s - 10.91x slower
#