Guides
Setting up CI checks people do not switch off
Every disabled check was once a good idea that fired at the wrong time. Reliability matters more than strictness.
Painter
CSS
Logical properties, and the day the site went RTL
Writing margin-inline-start instead of margin-left costs nothing today and saves a month the first time somebody asks for Arabic.
Deep dives
Memory in a long-lived single page app
The bug report says "it gets slow after a few hours". That is a leak, and the heap snapshot will name it.
Performance
The quarterly budget review, in twenty minutes
Four numbers, one trend line each, and a decision about whether to move the tripwire. That is the whole meeting.
Performance
The real cost of adding a dependency
Kilobytes are the cheapest part. The expensive part arrives eighteen months later, on a Friday.