Browser – Request Wait (Assets, XHR, Pageload)
Request waiting phase indicates the time from when the browser starts sending the request to getting the first response bytes from the backend. We differentiate 3 different Root Causes for assets (CSS, images, etc.), XHR and full page load requests. Root Cause grouping is done using:
- domain name for Assets and full page load requests
- shortened URL for XHR requests
While for all previous Root Causes the main reason can be network, here the reason can more likely be in the backend system and one needs to performance test and debug the system to find the real reason.