Merge pull request #2831 from kwleland/string_element_assignment

String[]= benchmark added

benchmark/core/string/bench_element_assignment.rb

@@ -0,0 +1,34 @@
+  require 'benchmark'
+  require 'benchmark/ips'
+
+  Benchmark.ips do |x|
+
+    s = "abcdefghijk"
+    last_index = s.length - 1
+    middle_index = last_index/2
+
+    x.report("element assignment at beginning") do |times|
+      i = 0
+      while i < times
+        s[0] = "x"
+        i += 1
+      end
+    end
+
+    x.report("element assignment in middle") do |times|
+      i = 0
+      while i < times
+        s[middle_index] = "x"
+        i += 1
+      end
+    end
+
+    x.report("element assignment at end") do |times|
+      i = 0
+      while i < times
+        s[last_index] = "x"
+        i += 1
+      end
+    end
+
+  end

benchmark/core/string/bench_scan.rb

@@ -1,7 +1,7 @@
   require 'benchmark'
   require 'benchmark/ips'
 
-  long_file = File.join(File.dirname(__FILE__), 'large.txt')
+  long_file = File.join("..","file",'large.txt')
   long_text = File.new(long_file).read.downcase
   medium_text = long_text.slice(0,1000)
   short_text = long_text.slice(0,100)