Compare kernel loop and while loop

Closes #79

Author: TheSmartnik

README.md

@@ -141,6 +141,24 @@ Custom exception: Kernel#raise:   589148.7 i/s
 Custom exception: E2MM#Raise:    29004.8 i/s - 20.31x slower
 ```
 
+##### `loop` vs `while true` [code](code/general/loop-vs-while-true.rb)
+
+```
+$ ruby -v code/general/loop-vs-while-true.rb
+ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux]
+
+Calculating -------------------------------------
+          While Loop     1.000  i/100ms
+         Kernel loop     1.000  i/100ms
+-------------------------------------------------
+          While Loop      0.536  (± 0.0%) i/s -      3.000  in   5.593042s
+         Kernel loop      0.223  (± 0.0%) i/s -      2.000  in   8.982355s
+
+Comparison:
+          While Loop:        0.5 i/s
+         Kernel loop:        0.2 i/s - 2.41x slower
+```
+
 #### Method Invocation
 
 ##### `call` vs `send` vs `method_missing` [code](code/method/call-vs-send-vs-method_missing.rb)

code/general/loop-vs-while-true.rb

@@ -0,0 +1,25 @@
+require "benchmark/ips"
+
+NUMBER = 100_000_000
+
+def fast
+  index = 0
+  while true
+    break if index > NUMBER
+    index += 1
+  end
+end
+
+def slow
+  index = 0
+  loop do
+    break if index > NUMBER
+    index += 1
+  end
+end
+
+Benchmark.ips do |x|
+  x.report("While Loop")  { fast }
+  x.report("Kernel loop") { slow }
+  x.compare!
+end