From 07bf56f2fb6fa529d271ed69bdb67e53b92eedcf Mon Sep 17 00:00:00 2001
From: Watson <watson1978@gmail.com>
Date: Mon, 18 Nov 2013 22:34:01 +0900
Subject: [PATCH] add a benchmark for string concatenation because CRuby has
 special optimization for short string

---
 test/Benchmark/app/benchmark/string/concat.rb | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/test/Benchmark/app/benchmark/string/concat.rb b/test/Benchmark/app/benchmark/string/concat.rb
index 4f35497a..5afd75b9 100644
--- a/test/Benchmark/app/benchmark/string/concat.rb
+++ b/test/Benchmark/app/benchmark/string/concat.rb
@@ -1,6 +1,7 @@
 def string_concat(x)
   ascii = "hello"
   utf8  = "こんにちは"
+  long_string = "The quick brown fox jumps over the lazy dog."
 
   x.report "interpolation with ASCII" do
     100000.times do
@@ -14,6 +15,12 @@ def string_concat(x)
     end
   end
 
+  x.report "interpolation with long" do
+    100000.times do
+      "#{long_string} #{long_string} #{long_string}"
+    end
+  end
+
   x.report "+ with ASCII" do
     100000.times do
       ascii + ascii + ascii
@@ -26,6 +33,12 @@ def string_concat(x)
     end
   end
 
+  x.report "+ with long" do
+    100000.times do
+      long_string + long_string + long_string
+    end
+  end
+
   x.report "<< with ASCII" do
     100000.times do
       str = ascii.dup
@@ -40,6 +53,13 @@ def string_concat(x)
     end
   end
 
+  x.report "<< with long" do
+    100000.times do
+      str = long_string.dup
+      str << str << str
+    end
+  end
+
   x.report "concat with ASCII" do
     100000.times do
       str = ascii.dup
@@ -54,6 +74,13 @@ def string_concat(x)
     end
   end
 
+  x.report "concat with long" do
+    100000.times do
+      str = long_string.dup
+      str.concat(str).concat(str)
+    end
+  end
+
   x.report "* with ASCII" do
     100000.times do
       ascii * 10
@@ -65,4 +92,10 @@ def string_concat(x)
       utf8 * 10
     end
   end
+
+  x.report "* with long" do
+    100000.times do
+      long_string * 10
+    end
+  end
 end