Rakefile in sig-1.0.0 vs Rakefile in sig-1.0.1

@@ -27,10 +27,11 @@
 desc "#{gemspec.name} | IRB"
 task :irb do
   sh "irb -I ./lib -r #{gemspec.name.gsub '-','/'}"
 end
 
+
 # # #
 # Benchmark: Take with a grain of salt
 
 desc "Compare with contracts and rubype"
 task :benchmark do
@@ -61,11 +62,11 @@
     sig [Numeric, Numeric], Numeric,
     def sum(x, y)
       x + y
     end
 
-    sig [Numeric, Numeric], Numeric,
+    sig [:to_i, :to_i], Numeric,
     def mul(x, y)
       x * y
     end
   end
   sig_instance = SigSum.new
@@ -80,11 +81,11 @@
     typesig :sum, [Numeric, Numeric] => Numeric
 
     def mul(x, y)
       x * y
     end
-    typesig :mul, [Numeric, Numeric] => Numeric
+    typesig :mul, [:to_i, :to_i] => Numeric
   end
   rubype_instance = RubypeSum.new
   puts "rubype version: #{Rubype::VERSION}"
 
   # - - -
@@ -95,44 +96,62 @@
     Contract Num, Num => Num
     def sum(x, y)
       x + y
     end
 
-    Contract Num, Num => Num
+    Contract RespondTo[:to_i], RespondTo[:to_i] => Num
     def mul(x, y)
       x * y
     end
   end
   contracts_instance = ContractsSum.new
   puts "contracts version: #{Contracts::VERSION}"
 
   Benchmark.ips do |x|
-    x.report("pure"){
-      pure_instance.sum(1, 2)
-      pure_instance.mul(1, 2)
+    x.report("pure"){ |times|
+      i = 0
+      while i < times
+        pure_instance.sum(1, 2)
+        pure_instance.mul(1, 2)
+        i += 1
+      end
     }
 
-    x.report("sig"){
-      sig_instance.sum(1, 2)
-      sig_instance.mul(1, 2)
+    x.report("sig"){ |times|
+      i = 0
+      while i < times
+        sig_instance.sum(1, 2)
+        sig_instance.mul(1, 2)
+        i += 1
+      end
     }
 
-    x.report("rubype"){
-      rubype_instance.sum(1, 2)
-      rubype_instance.mul(1, 2)
+    x.report("rubype"){ |times|
+      i = 0
+      while i < times
+        rubype_instance.sum(1, 2)
+        rubype_instance.mul(1, 2)
+        i += 1
+      end
     }
 
-    x.report("contracts"){
-      contracts_instance.sum(1, 2)
-      contracts_instance.mul(1, 2)
+    x.report("contracts"){ |times|
+      i = 0
+      while i < times
+        contracts_instance.sum(1, 2)
+        contracts_instance.mul(1, 2)
+        i += 1
+      end
     }
-    x.warmup = 10
+
     x.compare!
   end
 end
 
+
 # # #
 # Specs
+
 desc "Run specs"
 task :spec do
   ruby "spec/sig_spec.rb"
 end
 task default: :spec