Playwright · Senior · Question 45 of 77

How can Playwright collect performance data for a page?

1Use expect(page).toBeFast() from the library
2Read Performance API values with page.evaluate
3Run the test with the --performance flag

Show the answer

Correct answer: Read Performance API values with page.evaluate

Explanation

Navigation and paint timings, or Chromium-only CDP metrics, can be collected and tracked, with care since CI timing is noisy.

Further reading

Playwright: Evaluating JavaScript ↗

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