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Should I be obsessed with PageSpeed Insights scores?

If I increase the number of ads, the speed of my mobile pages plummets

10:51 am on Aug 20, 2019 (gmt 0)

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joined:Sept 3, 2017
votes: 1

I've found that the speed of my webpages plummets, from 75% (no ads) to 45% (3 ads), when analyzing them through PageSpeed Insights (mobile). The ad units are 300x250. If I insert only 2 ad units the speed is 55%, but the incomes obviously decrease. With PageSpeed Insights (desktop) the speed in 85% even with 5 ad units.

First of all, I do not understand why Google penalizes so severely the load of the ads, since they are loaded asynchronously:
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js">

As far as I understand, the consequence is that it takes 1-2 seconds for the ads to be seen by the user, but the rest of the contents are showed ok, right?

I'd like to share experiences from other users with this issue of "speed vs incomes" on mobiles.
- Can I consider that 55% with 2 mobile 300x250 units is an acceptable score?
- Would it be better if I increase the number of ad units, but I reduce their dimensions? (e.g, 1x300x250 + 2x320x50)

Thank you.
6:16 am on Aug 21, 2019 (gmt 0)

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Check the 'Reduce JavaScript execution time' diagnostic. Adsense scripts have ridiculous CPU/evaluation times and they get worse on weak (mobile) processors.

AFAIK, there is nothing we can do on our end, except waiting for a fix from Google. My suggestion is, remove all the adsense ads temporarily and try to get the best score you can. Then, put them back and don't look back.
6:47 am on Aug 21, 2019 (gmt 0)

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WebmasterWorld Senior Member tangor is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

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Should you worry? Yes.

Is there anything you can do about it? No.

These insane speeds are fully linked to third party interactions (g ads). To prove that is true re-code the page (comment out the ads), and speed test again. :)

On the other hand ... from a user perspective ... one ad is okay ... two, maybe, but a webmaster trying to make money by piling on ads will see the user not bother to wave bye bye when they bounce.

IF, however, the re-code test STILL loads slow you much be doing something horribly wrong!

Test, Test, Test!

Note: I routinely have 80k word texts, 498kb in size, with 2-4 images, load in under 1 second over a 12mb connection. Over mobile speeds the page STILL renders within 1 second for the USER'S immediate Viewing, though the rest of the page might take a second or two longer to complete. Disclaimer: NO ADS by THIRD PARTIES INVOLVED. Direct Ads, hosted my server, load at the same time.