Perf Recorder records memory, CPU, DOM growth, Core Web Vitals, network and console data straight from your browser tab, then charts it so a leak or a slowdown is obvious at a glance.
One Stop button captures a complete, timestamped picture of the tab, with no instrumentation in your code.
Tracks JS heap, RSS and DOM growth, then flags a possible leak when usage trends up across the run instead of settling.
Per-tab CPU usage plus main-thread busy time from long tasks, so you see exactly when the page locks up.
Node counts (top frame & Blink) and JS event-listener totals over time. The usual suspects behind a creeping leak.
INP, CLS, LCP, FCP and Long Animation Frames sampled live, so responsiveness regressions show up next to the cause.
Request counts and WebSocket frames are captured alongside everything else, so traffic spikes line up with the metrics.
Console output and errors are recorded with timestamps and surfaced in the report, with no DevTools left open.
No setup in your app. Profile a real user flow (a soak test, a noisy dashboard, a long session) and read the result here.
Open the extension on the tab you want to profile and hit Record. It samples the page every few seconds in the background.
When your flow is done, press Stop. A perf-report-*.json file is saved straight to your Downloads. Nothing leaves your machine.
Drop that file into the analyzer to chart every metric, see the leak verdict, and pinpoint regressions.
Recording and analysis happen entirely on your device. There are no servers, no analytics, and no accounts. Reports are saved only to your computer, and the analyzer reads them locally too.