What happens (or fails to happen) when a large number of users wants to take advantage of your application’s functionality all at once? That’s where application performance testing comes in.

Once a mere HTML forms processor, PHP has dramatically evolved into a capable, mature programming language. But it was never tailored to support the distribution of a program in a non-source code package. In this article, we study some of the engine’s internal mechanisms and consider a few observations with the OPcache extension to propose […]

This month we have a “cookbook” of producer-consumer programming examples. We work through a complete example of timing production web page loads. We then consider techniques for message versioning, funneling, and feature migration.