How to check a website for optimization if it is in stages of development?

Hi all is there any online servers to test website performance and optimization. I may not share and performance lies not in the structure of the website and the server. Don't know how important is what I wrote the site, but I wrote on django 2.2
April 4th 20 at 13:24
1 answer
April 4th 20 at 13:26
In chrome in devtools there is a performance tab

Find more questions by tags Web Development