Google PageSpeed ​​shows different readings. what to believe?

Question

Google

Hello, it shows different scores all the time, different indicators
show
Largest Contentful Paint 5.3 sec.
I will update, and there will be
Largest Contentful Paint 2.9 sec.
sometimes it goes to 2.7, sometimes it goes to 6. what the hell? the site is empty, there is no content, respectively, the load is still too

Answer 1

Most likely, you have govnohosting, since the indicators jump like that. Moreover, as you were told in the comments, this is so much for a clean site. With a load, everything will lie there and crawl.

Answer 2

Let me tell you, this happens to me too.
I stopped trusting Google for speed because a lot depends on various factors.
1) Libraries and their weight
2) Framework and their weight
3) The server on which your site sits and its resources
4) Traffic throughput
5) Server settings (if you are a system administrator and understand Linux), then it is likely that you could easily impose security on security .
6) Server distance, server quality and company quality.
There are a lot of factors, it all depends on different things.
But I would not take into account ONLY google page speed, I would take into account customer reviews from mobile and desktop.
Google may say one thing, but customers will say another.
At the company where I work, I collected data from about 7 thousand of our customers and interviewed what their minimum and maximum download speeds are for different options.
Out of 7 thousand, they answered me that for them the speed is acceptable within: 2-3 seconds on a phone in the city with 4G / 4G +, 3G / 3G.
outside the city: around 3-5 seconds from mobile phones regardless of the network
On the computer: up to 2.9 seconds.
To listen to Google's advice means to listen only to its requests, and only to its words.
It's like going to the MMA master now and saying that the Krav Maga master is better, and he teaches better, and in general, many people now go to Krav Maga because it is popular.
Likewise here, try to listen to customers and send your site to customers.
Try to determine how it would be more convenient for you, how long you would wait.
If you are satisfied with loading in 3 seconds from a cell phone, and from a desktop 2.3, then go to such indicators

Answer 3

It also says: "Values ​​are approximate and subject to change." After 28 days (maybe more) , such a plate should appear in the Origin Summary section, these are average values, you should focus on them