redo Array#select/#reject to use a shared array, no dup

benchmark/core/array/bench_reject.rb

@@ -1,42 +1,37 @@
 require 'benchmark'
 require 'benchmark/ips'
+require File.expand_path('../shared_array.rb', __FILE__)
 
 Benchmark.ips do |x|
-  strings = ('a'..'j').to_a
-  numbers = [-4, -81, 0, 5, 12, -1_000_000, 1, 10, 100, 1000]
 
-  x.report "reject string" do |times|
+  x.report "reject all" do |times|
     i = 0
     while i < times
-      a = strings.dup
-      a.reject { |v| v < 'd' }
+      $large_array.reject { |v| true }
       i += 1
     end
   end
 
-  x.report "reject numbers" do |times|
+  x.report "reject none" do |times|
     i = 0
     while i < times
-      a = numbers.dup
-      a.reject { |v| v < 10 }
+      $large_array.reject { |v| false }
       i += 1
     end
   end
 
-  x.report "reject! string" do |times|
+  x.report "reject! all" do |times|
     i = 0
     while i < times
-      a = strings.dup
-      a.reject! { |v| v < 'd' }
+      $large_array.reject! { |v| true }
       i += 1
     end
   end
 
-  x.report "reject! numbers" do |times|
+  x.report "reject! none" do |times|
     i = 0
     while i < times
-      a = numbers.dup
-      a.reject! { |v| v < 10 }
+      $large_array.reject! { |v| false }
       i += 1
     end
   end

benchmark/core/array/bench_select.rb

@@ -1,24 +1,21 @@
 require 'benchmark'
 require 'benchmark/ips'
+require File.expand_path('../shared_array.rb', __FILE__)
 
 Benchmark.ips do |x|
-  strings = ('a'..'j').to_a
-  numbers = [-4, -81, 0, 5, 12, -1_000_000, 1, 10, 100, 1000]
 
-  x.report "select string" do |times|
+  x.report "select all" do |times|
     i = 0
     while i < times
-      a = strings.dup
-      a.select { |v| v > 'd' }
+      $large_array.select { |v| true }
       i += 1
     end
   end
 
-  x.report "select numbers" do |times|
+  x.report "select none" do |times|
     i = 0
     while i < times
-      a = numbers.dup
-      a.select { |v| v > 10 }
+      $large_array.select { |v| false }
       i += 1
     end
   end

benchmark/core/array/shared_array.rb

@@ -0,0 +1,226 @@
+$small_array = [
+  [[[117953105]]],
+  [:bRV, :OD2eTYQBQY],
+  :"4rWCHMbY",
+  [[327776907, :pXJXJ8]],
+  784670386,
+  [[57548812, [:LVhmVvg0, 113018416]]],
+  :T,
+  299999475,
+  [[290463539, 604740052]],
+  :"5mIYTzDPBNV",
+  108807115,
+  160688221,
+  400750804,
+  277035297,
+  :lSnApoUIMS,
+  328808562,
+  [:isof7aNStwzp, 551905300],
+  591827388,
+  164604988,
+  695513112,
+]
+
+
+$large_array = [
+  :DCne,
+  :apScTg7EbT,
+  640650437,
+  :roPpncD,
+  :M,
+  :Shy8tTJvIK,
+  :NvL,
+  [884390611, [[811803718]]],
+  [:LGW, :"2DToMCMxx"],
+  719751067,
+  [:pIVIU3yJyV, [:mER5fdj]],
+  766179378,
+  :"8I",
+  368909659,
+  301511183,
+  878211544,
+  308683354,
+  462827137,
+  981965402,
+  [[525760611, [440398323]], [262473977, :"4s4zCTyq"]],
+  209805240,
+  565508721,
+  355311411,
+  [[487599522], [23816217, :Ad]],
+  [885664140, 738202711],
+  :pEs,
+  507949515,
+  424218410,
+  :VvFSNf,
+  108053500,
+  [[:uxigf, [[910647325, 396262021], 252069733]], :BGIl],
+  [[:Kr1fz0el], [94594073, :Kc2]],
+  [[501572927], :RBuZ],
+  [[980018256, :g], :iY03R],
+  355922486,
+  [[:"3KqNVj"]],
+  :EeR2XP,
+  [[[473462304, 54796102], 801503872]],
+  :tbFhh1EawuQ,
+  :VlweBX,
+  :e5q8hFF85,
+  [209840388, 381195542],
+  77947233,
+  :"8ZMuAcL",
+  :ZG,
+  [:z],
+  312142962,
+  [:i5Bwr2MM, [[[:eH]]]],
+  :d3o18o4RPDo2,
+  178571067,
+  98937471,
+  570139119,
+  198078444,
+  954066365,
+  [:"3eAsdQiXfa", [:H7M4GJcInA]],
+  [:WPJiRVy8GgWj],
+  [[:kVpRcp, [925195711, 735262942]]],
+  139916477,
+  [[[449500215, [[[538177591, :zwBo2GeB]]]]]],
+  150147479,
+  [:i],
+  :nl3p,
+  :h,
+  [[690972725]],
+  63171115,
+  618439953,
+  [:hUsiP, 941514031],
+  [:O, [:"0gKNDi7", :"3mHer2Y"]],
+  492512323,
+  251805990,
+  :GO2Q,
+  805563105,
+  21740345,
+  [[:HVeJ, [[[:EHhUCUbb2H, [[225210099], :VdVgm1]]]]], [933914789, 662774857]],
+  :OJBV1,
+  510765990,
+  :BNnIwrl,
+  :kjIl7,
+  :s70z,
+  [:TdcdVS],
+  966030764,
+  :MQWJmfCSRj,
+  [438192977, 502008215],
+  :"5xi3Y",
+  636435632,
+  207025153,
+  :PFzxjdA8o7,
+  :TqPWSWgsdnhY,
+  899256241,
+  25966241,
+  :VIIe4xcfCMp,
+  [[966745699], 363426800],
+  896569084,
+  544335267,
+  23708017,
+  579447032,
+  [[[73248903], [833143227, 638412150]], [:UZE2]],
+  863196727,
+  :"1",
+  876403705,
+  :S33YA0FD674,
+  :ei,
+  [[:g7Ajitpwu1, 699266918], :ZtASraQs0C],
+  725589209,
+  [:CcPFjRW, [[800775167, [[349587951], [[:MrXhz]]]], :Dv]],
+  :"1T",
+  [[135940766]],
+  162299597,
+  804590524,
+  995712703,
+  [:R5f0aP3WUabo, [[401304198], :GpWYVRfT]],
+  :Bd3GbVC4,
+  963974873,
+  [[:"4ko", [298754976]]],
+  :Q8g1K,
+  :hh,
+  [[[[:KUfwKlTc, [:n1]]]], [[[[264794941]], :dPQ]]],
+  376769153,
+  [415067096, :M6tL21ybm3],
+  376526623,
+  940099721,
+  [821478278, :ibgqT11bB7q0],
+  366773709,
+  :IDP,
+  29446697,
+  [444247007, 641181723],
+  :hEqN,
+  [:kp, :MkKIi],
+  [[[:eVkMZmU83ccl], :OPH8fMzDCN], :RvZj3tH4Q],
+  471757853,
+  :fmo,
+  :GnYkzzL,
+  :Yby,
+  :fsb2,
+  [900813922, :u],
+  :P,
+  :DTxZwjWfEoNf,
+  218143925,
+  [562927537],
+  536303244,
+  438309558,
+  :XFdfJLXwU,
+  [[[:zbagiCSYpl], 665516321], [798237776, :LkVqk7JH]],
+  :RhnG,
+  529359312,
+  185868915,
+  260824547,
+  744694017,
+  725445205,
+  [[680032845, :n], :OUj1EILL5GL],
+  :gm7AdIAQicd,
+  665330641,
+  :YA0x,
+  :EYK1,
+  :gfnfPy,
+  354183973,
+  729295195,
+  771920833,
+  [:fxFj],
+  37766541,
+  804699185,
+  :YRrFitD,
+  :W,
+  [[:V6u6nzWQZ]],
+  104311942,
+  [500139637],
+  :bpVnAffQb,
+  [:MR0rSDTvVl, 343968413],
+  267489586,
+  :x5eLKOzpCws,
+  990331322,
+  :M,
+  :AU6nFC8V,
+  273592958,
+  :hEj5dbjTG,
+  [623554159],
+  345872794,
+  621040909,
+  926121238,
+  [:v, :kEe],
+  689561990,
+  838812795,
+  46835249,
+  172284993,
+  [803588660, 717203845],
+  [:d],
+  126893892,
+  :"8DBqlrWm",
+  139052367,
+  :"1",
+  927142311,
+  :Rhp,
+  192500452,
+  [16557598, 219816350],
+  [:Iv5x, [846371158]],
+  [953388069],
+  948311974,
+  [:rtNolMF, 368694274],
+  [[[[:"4fDM3cdfHp"]]]],
+  :vaxk68l6,
+]