added fiber blog post sample file

Author: rrevi

fiber_blog_post.rb

@@ -0,0 +1,67 @@
+#!/usr/bin/env ruby
+
+# asynchronous - using blocking Fiber primitive
+def nap
+    # puts "you now have to wait, while I nap..."
+    sleep 3
+    # puts "...and now I'm awake, you can move along."
+end
+
+puts "blocking asynchronous execution, using the Fiber primitive"
+fiber = Fiber.new do
+    nap
+    nap
+end
+
+fiber.resume
+puts "blocking fibers are so boring."
+
+# asynchronous - non-blocking fiber using Async gem
+require 'async'
+
+def nap_async
+    Async do |task|
+        # puts "you now have to wait, while I nap..."
+        sleep 3
+        # puts "...and now I'm awake, you can move along."
+    end
+end
+
+puts "non-blocking asynchronous execution, using the Async gem"
+
+Async do
+    nap_async
+    nap_async
+end
+
+puts "non-blocking fibers are so much fun!"
+
+# benchmark
+require 'benchmark'
+
+Benchmark.bm do |x|
+  # sequential version
+  x.report('sequential'){ 3.times{ nap } }
+
+  # blocking fiber version
+  x.report('blocking fiber'){
+    3.times.map do
+        fiber = Fiber.new do
+            nap
+        end
+
+        fiber.resume
+    end
+  }
+
+  # non-blocking fiber version
+  x.report('non-blocking fiber'){
+    Async do 
+      3.times.map do
+        Async do
+            nap_async
+        end
+      end
+    end
+  }
+end