Performance testing can be a tricky proposition, how many times have you deployed code that fell apart in production? (Hey, we’ve all done it!) Having a staging environment, which replicates the data and deployment environments are great first steps, but even that often falls short from producing reliable results. And that is where load testing comes in: we need to test our application in the context of a multi-user audience interacting with all of the components of our site. Great, but how do we do that? Well, why not just grab the access logs from your current production environment, and replay them!
