<div dir="ltr">Hello WebKit-dev,<br><br>I’d like to request WebKit’s official position on scheduler.postTask(), an API for scheduling and controlling prioritized tasks. It is specified in [1] and further described in [2]. We’ve presented the API a few times to the WebPerf WG. One concern raised there by rniwa was the risk of priority inversions, which we’ve explored in [3].<div><br></div><div>We recently finished running an Origin Trial in Chrome. Airbnb, who we’ve been working closely with, experimented with using the API to improve their site’s performance, which they wrote about recently [4].<br><br>[1] Spec: <a href="https://wicg.github.io/scheduling-apis/">https://wicg.github.io/scheduling-apis/</a><br>[2] Explainer: <a href="https://github.com/WICG/scheduling-apis/blob/main/explainers/prioritized-post-task.md">https://github.com/WICG/scheduling-apis/blob/main/explainers/prioritized-post-task.md</a><br>[3] Priority inversion exploration: <a href="https://github.com/WICG/scheduling-apis/blob/main/misc/priority-inversion.md">https://github.com/WICG/scheduling-apis/blob/main/misc/priority-inversion.md</a><br>[4] Airbnb blog post: <a href="https://medium.com/airbnb-engineering/building-a-faster-web-experience-with-the-posttask-scheduler-276b83454e91">https://medium.com/airbnb-engineering/building-a-faster-web-experience-with-the-posttask-scheduler-276b83454e91</a><br><br>Additional Links:<br> - Preliminary TAG review: <a href="https://github.com/w3ctag/design-reviews/issues/338">https://github.com/w3ctag/design-reviews/issues/338</a><br> - TAG Spec review (under review): <a href="https://github.com/w3ctag/design-reviews/issues/647">https://github.com/w3ctag/design-reviews/issues/647</a><br> - Chrome Status entry: <a href="https://www.chromestatus.com/feature/6031161734201344">https://www.chromestatus.com/feature/6031161734201344</a><br><br></div><div>Thank you,</div><div>Scott</div></div>