Wordpress why is this happening?

Ok so I got this report in GTMetrix



Why the first/main HTTP request (I do not know how is called, GTMetrix shows it as the URL of the page, is also the first request in the Timeline) takes that much to load?

Is staying on 1,5s and only after that the rest of the requests are taking place. Is the server slow, or do I have too many files?

Also, why all the requests are not called simultaneously? Why they start only after the previous request is finished?

Ok, I got it, the first 5 requests are the primary one that should be called first but then I have just images and Google Adsense scripts. Why they are called just after the previous request is completed?

Since they are all images and Google Adsense scripts shouldn't they be called at the same time?

I do lazy load the images but I do not think that is the reason.

Anyway, my main concern is the first one raised here, why the server takes that long to respond?

I've lost 6 hours trying to figure it out but I still don't get it

Any help would be highly appreciated

Thank you

Adsense ads slow the site reduce the ads and you’ll recover some speed

Mr Positive said:

Adsense ads slow the site reduce the ads and you’ll recover some speed

Click to expand...

Hei mate, thank you for your fast response.

Regarding what you said, doesn't GTMetrix shows the load speed for each script individually? I do see that in the report and I see that each Ads is taking less than 50ms to load which is not a problem for me.

Or do you say that the 1.96s of the first request is due to this?

I just think that the website is almost fully optimized and the load speed for each request is extremely low.. but because the requests are not called all at once and they are called one by one they take much more time to fully load the page.

So I believe if I make the requests to be called at the same time I can save up to 60% speed

And the rest would be the high backend duration of the main request which I have no idea how to fix it and what cause that slow load

Your site is loading within 1.96 secs, then adsense starts studying user stats to server best ads, and then it takes a world tour through google, youtube, google ad services, google apis, doubleclick, google syndication, gstatic, addthis, pubmatic, casalemedia, openx etc. It completes the page load when it returns. Unfortunately, they demand us to have faster websites for better ranking.

I would recommend installing "WP-Rocket" plugin and optimize the site with it, there's a lot of settings you can play arroud and see if that will help you

Is it the redirect from http to https? I remember similar thing with my website.

The TTFB (time to first byte) is huge because of long mysql queries being processed via PHP.
Either you have a plugin that does lots of requests and tasks on page load or you have a custom code that does long-running queries.

If you can't find what is causing the problem, it would be great if you can ask your hosting (or check by yourself if you have a WHM) which database query is taking more than few seconds to be completed.