Performance

Articles about Performance by Sebastian Bergmann

A glowing magnifying glass over a bug symbol, held by a hand, against a dark background of binary code and geometric patterns. A visual metaphor for the disciplined investigation of performance problems.

April 23, 2026

Debugging Performance in PHP

"It feels slow" is not a diagnosis. I explain the three disciplines that turn vague complaints into actionable data: tracing, profiling, and benchmarking.

The image shows a glass surface covered with fine water droplets or condensation. A large question mark has been painted or wiped onto this fogged-up glass. The background appears yellowish to greenish and blurred, so that the question mark clearly stands out as the central motif.

October 8, 2020

Caching makes everything faster. Right?

While working on PHPUnit, I encountered an interesting problem.

Stay up to date

Receive a comprehensive analysis of new PHPUnit features, implementation details, and the strategic considerations behind each improvement via email every two months.

Subscribe now