Recurring 3 second timer firing in performance tab while app is idle

[dwilt]

In an effort to increase performance in our app, we are monitoring the JS thread via the Performance tab in the Google Dev Tools. While the app was idle, I took a Performance recording for 13 seconds and noticed that about every 3 seconds, there was a bunch of processing/activity by SWR. I disabled all of our polling in our app.

These tasks total up to about 12 milliseconds worth of CPU time but at 6x slowdown that's 72ms every 3 seconds. Any ideas what these might be and is there a way to disable them?

[shuding]

Thanks for reporting! What's the version of SWR that you're using? Also is there something else that triggers re-rendering periodically?