How to properly set request timeout in cURL?

Question

PHP

Noticed something interesting. If in cURL I set a timeout equal to 10 seconds using CURLOPT_TIMEOUT , then the request in the browser is interrupted not after 10 seconds, but after 14 - 15 seconds. Where and due to what are these additional 4 - 5 seconds above the timeout taken from? Is there any way to set strictly 10 seconds? Perhaps it makes sense to use not the native timeout from cURL , but an external one through the php-function set_time_limit ?

Answer 1

curl_setopt($cl,CURLOPT_TIMEOUT,90);