"Profiling live Wikipedia traffic with near-zero overhead"

> Each day of Wikipedia backend traffic yields about 3 million stack trace samples, as collected by Excimer, a new a low-overhead sampling profiler for PHP.

I wrote all about it in this year's Performance Calendar:

👉 https://calendar.perfplanet.com/2020/profiling-php-in-production-at-scale/

#webperf #perfmatters #php #profiler