Why does the site have a slow response time from the server? How to speed up?

Question

MODX

Hello. I have a website virtualnyeochki.ru. I check it with this test:
https://developers.google.com/speed/pagespeed/insi...
And it gives a slow server response time. I am attaching a screenshot. What could be the reason? How to speed up?

I connect almost all scripts and styles through MinifyX, set lazyload, compressed pictures to a minimum. Does not help.
PS site on modx, but to speed up the response from the server, probably, any methods will do (not only for modx).

Answer 1

https://gtmetrix.com/reports/virtualnyeochki.ru/Yk...
You can boldly go through the points, your task is to bring it to A (ideally).
Make gzip caching on the server, enable http\2 on the server to reduce the number of requests to the server, gtmetrix also advises you to put your images into a sprite (doubtful in 2019 for such a site), try to reap them.
Google Speed ​​insight is a subjective tool, a general (approximate) analysis of your optimization is done by separate tools, and it is tested under conditions - poor Internet, load, etc.

Answer 2

The server response time is the time the backend is running from the moment a request is received to the moment a response is returned. Scripts, styles and pictures have nothing to do with it at all. Profile the execution of the backend, find out the bottlenecks and optimize them.

Answer 3

Usually it depends on the curvature of the backend and the power / settings of the server.
During this period of time the page is assembled. You can
check the processor like this https://modx.pro/hosting/3432 or https://tools.lite.company/performance/

Answer 4

How much RAM is on the virtual machine? Must be at least 4 gigabytes.
If not VDS, but "virtual hosting" - write to the provider, ask to be moved to another server.