Which php or apache directive can be responsible for pausing when stepping imports?

Question

1C-Bitrix

I’m suffering and can’t understand, the step-by-step import of goods is set up so that 30 positions are processed and then it goes on, so the pause between these processings is very large and even a file with 100 positions loads for 2-3 minutes, as I understand something lies in the settings server, but it is not clear what
exactly can affect the
import speed in seconds) Session start time 0.0001 0.0002 seconds PHP configuration optimal optimal recommendations
MySQL database (write) 14,436 5,600 write requests per second
MySQL database (read) 26,225 7,800 read requests per second
MySQL database (modify) 13,925 5,800 change requests per second

Answer 1

What about imports? Maybe it's running on agents, and the agents are set to cron ? Then, depending on the settings, the import agent will work once a minute, or even more.