Test transaction page performance

Usually we test web page performance. Maybe test 1000 with 5 concorrent.
If we test a transaction page performance. Will left many ugly transaction data.
So we can desgin a dryrun mode. below is ruby on rails sample.

1. <pre>  class PurchasesController < ApplicationController
2.     def create
3.       ActiveRecord::Base.transaction do
4.         # This do purchase
5.         raise ActiveRecord::Rollback if params[:dryrun] # when dryrun then rollback.
6.       end
7.     end
8.   end
9. </pre>