akshay-vishnoi · December 31, 2015 17:49 · Dec 18, 2013 · Dec 18, 2013 · Dec 18, 2013 · Dec 18, 2013
diff --git a/many_performance.rb b/many_performance.rb
@@ -6,7 +6,6 @@ def old_many?(enum)
 end
 
 def new_many?(enum)
-  cnt = 0
   enum.count > 1
 end
 

diff --git a/PerformanceImprovement → many_performance.rb b/PerformanceImprovement → many_performance.rb
diff --git a/PerformanceImprovement b/PerformanceImprovement
@@ -0,0 +1,31 @@
+require 'benchmark/ips'
+
+def old_many?(enum)
+  cnt = 0
+  enum.any? { (cnt += 1) > 1 }
+end
+
+def new_many?(enum)
+  cnt = 0
+  enum.count > 1
+end
+
+enum = (1..1000).to_a
+
+Benchmark.ips do |b|
+  b.report('old') do
+    old_many? enum
+  end
+
+  b.report('new') do
+    new_many? enum
+  end
+end
+
+# Output
+# Calculating -------------------------------------
+#                 old     57932 i/100ms
+#                 new     93881 i/100ms
+# -------------------------------------------------
+#                 old  1312923.5 (±3.1%) i/s -    6604248 in   5.035705s
+#                 new  4991185.8 (±3.2%) i/s -   24972346 in   5.009269s