SuiteCRM. How to understand what slows down the formation of pages?

Question

linux

SuiteCRM. How to understand what slows down the formation of pages?
Page generation over 3 seconds.
I'm not very strong in PHP to screw up temporary counters.

Answer 1

$start = microtime(true);
    
    // Тут код, скорость которого нужно узнать
    
    echo 'Время генерации: ' . ( microtime(true) - $start ) . ' сек.';