How to remove restriction (on connections?) at Ajax script request?

Question

PHP

There is a script script.php, there is a page that requests this script via Ajax 30 times at the same time (the script does different actions according to the get parameter).

In theory, this should be asynchronous, but I notice that it works like this for the first 5 together, and then when one is completed, the next one takes its place.

The question is, what do I need to change in the nginx, Apache2 or PHP settings so that all 30 requests are executed asynchronously at once?

Answer 1

This is a browser limit on the number of simultaneous connections.

Answer 2

Is it possible to somehow optimize and feed these parameters for a smaller number of times? I reason like this: if 30 times - at the same time, then the parameters are already predefined and for example 2 ... n parameter / value does not depend on what is returned as a result of the first request, right?
Then why make 30 requests, if you can immediately transfer all 30+ parameters in json or anything at once, and also return the result in the form of the same json or a string with a pentacle as a separator ... not so important :)
An inner voice says: "Most likely this person does not know how to parse the result into pieces, that's why he makes 30 requests at the same time"