This is documentation for the next version of K6. For the latest stable release, go to the latest version.

Documentation

timing()

Open source

timing()

Returns resource timing information for the given request. Most of the timing values become available upon the response, responseEnd becomes available when request finishes.

Returns

Type	Description
ResourceTiming	Returns ResourceTiming.

ResourceTiming

Property	Type	Description
statTime	number	Request start time in milliseconds elapsed since January 1, 1970 00:00:00 UTC.
domainLookupStart	number	Time immediately before the browser starts the domain name lookup for the resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
domainLookupEnd	number	Time immediately after the browser ends the domain name lookup for the resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
connectStart	number	Time immediately before the user agent starts establishing the connection to the server to retrieve the resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
secureConnectionStart	number	Time immediately before the browser starts the handshake process to secure the current connection. The value is given in milliseconds relative to `startTime`, -1 if not available.
connectEnd	number	Time immediately after the user agent establishes the connection to the server to retrieve the resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
requestStart	number	Time immediately before the browser starts requesting the resource from the server, cache, or local resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
responseStart	number	Time immediately after the browser receives the first byte of the response from the server, cache, or local resource. The value is given in milliseconds relative to `startTime`, -1 if not available.
responseEnd	number	Time immediately after the browser receives the last byte of the resource or immediately before the transport connection is closed, whichever comes first. The value is given in milliseconds relative to `startTime`, -1 if not available.

Example

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    const res = await page.goto('https://test.k6.io/');
    const req = res.request();

    const timing = await req.timing();
    console.log(`timing: ${JSON.stringify(timing)}`); // timing: {"startTime":534898988.85297775,...}
  } finally {
    await page.close();
  }
}