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

Documentation

size()

Open source

size()

The size of the response body and the headers.

Returns

Type	Description
Promise	Returns Size.

Size

Property	Type	Description
body	number	Size in bytes of the response body.
headers	number	Size in bytes of the headers body.

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 size = await res.size();
    console.log(`size: ${JSON.stringify(size)}`); // size: {"headers":174,"body":11279}
  } finally {
    await page.close();
  }
}