Timo Tijhof @krinkle@mastodon.technology

"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

A collegue of mine ran into this some interesting code behaviour today. I encountered this before, but didn't realize it was still a thing. Fun times!

Can you guess what caused the string to become an integer?

👉 https://3v4l.org/odIiW

#php #wat #how #spoiler

"Impact of using HTTP connection pooling for PHP applications at scale", by Giuseppe Lavagetto (Wikimedia)

- using Envoy,
- backend service's CPU usage went from 2.5 CPU cores to circa 0.8 CPU cores,
- PHP application's latency histogram bucket for <= 100ms went up by 12 percentage points.

https://techblog.wikimedia.org/2020/10/26/impact-of-using-http-connection-pooling-for-php-applications-at-scale/
#webperf #envoy #PHP