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W3C Performance API

W3C Performance API​

The Embrace SDK automatically collects timing data from the browser's Performance API, giving you visibility into how your application and its resources perform in real user environments.

Available Instrumentations​

  • User Timing - Captures custom performance marks and measures created by your application via performance.mark() and performance.measure()
  • Element Timing - Tracks render and load timing for elements annotated with the elementtiming attribute
  • Server Timing - Reads backend performance hints sent via the Server-Timing HTTP response header on navigation requests

Opting Out​

Each instrumentation is always-on by default. Individual instrumentations can be disabled via the omit option when initializing the SDK:

import { initSDK } from '@embrace-io/web-sdk';

initSDK({
  appID: "YOUR_EMBRACE_APP_ID",
  appVersion: "YOUR_APP_VERSION",
  defaultInstrumentationConfig: {
    omit: new Set(['user-timing', 'element-timing', 'server-timing']),
  },
});