View test results

1. Click into a spike or failure in your test run results.

Spike in the browser test performance KPIs chart Spike in the browser test performance KPIs chart

2. What can you learn about this test run? If it failed, use the error message, filmstrip, video replay, and waterfall to understand what happened.

Single test run result, with an error message and screenshots Single test run result, with an error message and screenshots

3. What do you see in the resources? Make sure to click through all of the page (or transaction) tabs.

resources in the browser test waterfall, with a long request highlighted resources in the browser test waterfall, with a long request highlighted

Workshop Question

Do you see anything interesting? Common issues to find and fix include: unexpected response codes, duplicate requests, forgotten third parties, large or slow files, and long gaps between requests.

Want to learn more about specific performance improvements? Google and Mozilla have great resources to help understand what goes into frontend performance as well as in-depth details of how to optimize it.