User Timing report
If you want your web app to be a good user experience, you need to make it both responsive and fast, so you need to improve overall performance starting with understanding where the most loading time is spent.
How SeoChecker reports User Timing data
You can check measures and marks added with the User Timing API in SeoChecker's audit.
You will see in the report various fields:
- Start Time
Do not consider the report as a test, rather consider it like an opportunity checker to improve your web app performances.