Benchmarks for Array#values_at

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62412 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

benchmark/bm_array_values_at_int.rb

@@ -0,0 +1,2 @@
+ary = Array.new(10000) {|i| i}
+100000.times { ary.values_at(500) }

benchmark/bm_array_values_at_range.rb

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+ary = Array.new(10000) {|i| i}
+100000.times { ary.values_at(1..2000) }