Bitrix(d7). Debug

debug.php

<?php
use Bitrix\Main\Diag\Debug;
use Bitrix\Main\Diag\Helper;

/*Write in file*/
//Debug::writeToFile($variable, $varName, $file);
Debug::writeToFile(['ID' => $ID, 'fields' => $arResult ], null, "log.log");
Debug::dumpToFile(['ID' => $ID, 'fields' => $arResult ], null, "log.log");

/*Time label*/
Debug::startTimeLabel('brand_list'); 
//get brand list
Debug::endTimeLabel('brand_list');
//Show time label
Debug::getTimeLabels(); 

/*Helpers*/
Helper::getCurrentMicrotime(); 
Helper::getBackTrace($limit = 0, $options = null);