add raw driver benchmark with casting for the mysql gem

benchmark/query_with_mysql_casting.rb

@@ -0,0 +1,82 @@
+# encoding: UTF-8
+
+require 'rubygems'
+require 'benchmark'
+require 'mysql'
+require 'mysql2_ext'
+require 'do_mysql'
+
+number_of = 100
+database = 'test'
+sql = "SELECT * FROM mysql2_test LIMIT 100"
+
+class Mysql
+  include Enumerable
+end
+
+def mysql_cast(type, value)
+  case type
+    when Mysql::Field::TYPE_NULL
+      nil
+    when Mysql::Field::TYPE_TINY, Mysql::Field::TYPE_SHORT, Mysql::Field::TYPE_LONG,
+         Mysql::Field::TYPE_INT24, Mysql::Field::TYPE_LONGLONG, Mysql::Field::TYPE_YEAR
+      value.to_i
+    when Mysql::Field::TYPE_DECIMAL, Mysql::Field::TYPE_NEWDECIMAL
+      BigDecimal.new(value)
+    when Mysql::Field::TYPE_DOUBLE, Mysql::Field::TYPE_FLOAT
+      value.to_f
+    when Mysql::Field::TYPE_DATE
+      Date.parse(value)
+    when Mysql::Field::TYPE_TIME, Mysql::Field::TYPE_DATETIME, Mysql::Field::TYPE_TIMESTAMP
+      Time.parse(value)
+    when Mysql::Field::TYPE_BLOB, Mysql::Field::TYPE_BIT, Mysql::Field::TYPE_STRING,
+         Mysql::Field::TYPE_VAR_STRING, Mysql::Field::TYPE_CHAR, Mysql::Field::TYPE_SET
+         Mysql::Field::TYPE_ENUM
+      value
+    else
+      value
+  end
+end
+
+Benchmark.bmbm do |x|
+  mysql2 = Mysql2::Client.new(:host => "localhost", :username => "root")
+  mysql2.query "USE #{database}"
+  x.report do
+    puts "Mysql2"
+    number_of.times do
+      mysql2_result = mysql2.query sql
+      mysql2_result.each(:symbolize_keys => true) do |res|
+        # puts res.inspect
+      end
+    end
+  end
+
+  mysql = Mysql.new("localhost", "root")
+  mysql.query "USE #{database}"
+  x.report do
+    puts "Mysql"
+    number_of.times do
+      mysql_result = mysql.query sql
+      fields = mysql_result.fetch_fields
+      mysql_result.each do |row|
+        row_hash = {}
+        row.each_with_index do |f, j|
+          row_hash[fields[j].name.to_sym] = mysql_cast(fields[j].type, row[j])
+        end
+        # puts row_hash.inspect
+      end
+    end
+  end
+
+  do_mysql = DataObjects::Connection.new("mysql://localhost/#{database}")
+  command = DataObjects::Mysql::Command.new do_mysql, sql
+  x.report do
+    puts "do_mysql"
+    number_of.times do
+      do_result = command.execute_reader
+      do_result.each do |res|
+        # puts res.inspect
+      end
+    end
+  end
+end