Add more examples in performance script.

[#5610 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

activerecord/examples/performance.rb

@@ -155,6 +155,23 @@ def self.feel(exhibits) exhibits.each { |e| e.feel } end
     ar { Exhibit.transaction { Exhibit.new } }
   end
 
+  report 'Model.find(id)' do
+    id = Exhibit.first.id
+    ar { Exhibit.find(id) }
+  end
+
+  report 'Model.find_by_sql' do
+    ar { Exhibit.find_by_sql("SELECT * FROM exhibits WHERE id = #{(rand * 1000 + 1).to_i}").first }
+  end
+
+  report 'Model.log', (TIMES * 10) do
+    ar { Exhibit.connection.send(:log, "hello", "world") {} }
+  end
+
+  report 'AR.execute(query)', (TIMES / 2) do
+    ar { ActiveRecord::Base.connection.execute("Select * from exhibits where id = #{(rand * 1000 + 1).to_i}") }
+  end
+
   summary 'Total'
 end