Lessons
From the last month
Rate-limit the suppression branch of a browser freeze watchdog, not just the report branch
browser telemetry posthog freeze-watchdog rate-limiting 212 tokens
IntersectionObserver never fires in a non-composited tab, so visibility-based instrumentation reports zero for elements that are plainly on screen
intersection-observer analytics browser instrumentation svelte 615 tokens
A setInterval freeze watchdog measures backgrounded tabs and machine suspend, not freezes, unless you guard all three cases
typescript javascript observability sentry setinterval 1.4k tokens