The movement towards designing with performance budgets in mind has inspired more fist pumps and vuvuzela bleating in this developer than the recent World Cup. Thinking through the ramifications of design choices for site performance makes it easier for me to build a fast website when development begins.
But when it comes to testing against budgets, we’ve been measuring page weight and rendering times manually, using tools like WebPageTest.org and Yahoo’s YSlow. Relying on humans to run tests has meant we don’t always measure our performance consistently, therefore missing page weight hogs like the occasional stray Blingee. There has to be a better way, right? A curious client got us wondering how we could automate our performance testing.