Long Task API

A performance API to enable applications to detect presence of “long tasks” that monopolize the UI thread for extended periods of time and block other critical tasks from being executed - e.g. reacting to user input.

Comments

Notes from TPAC discussion: https://docs.google.com/document/d/1RigHs7a4yRcVUt4fPswOZLKY_-tDlPiz8hPokBixHEk/edit#heading=h.mwr9aubzxuqt

Documentation

• https://github.com/w3c/longtasks
• https://developer.mozilla.org/en-US/docs/Web/API/Long_Tasks_API

Specification

Working draft or equivalent

Status in Chromium

Blink components: Blink>PerformanceAPIs

Enabled by default (launch bug) in:

• Chrome for desktop release 58
• Chrome for Android release 58
• Android WebView release 58

Consensus & Standardization

• Firefox: No public signals
• Edge: Public support
• Safari: Public support
• Web Developers: Strongly positive

Owners

• panicker@chromium.com
• igrigorik@chromium.org

Last updated on 2017-06-15