Como verificar o tempo de carregamento da página no PHP
$startTime = array_sum(explode(" ",microtime()));
error_log("Started time=======".$startTime);
echo "=======Your Code=======";
echo "=======Your Code=======";
echo "=======Your Code=======";
echo "=======Your Code=======";
echo "=======Your Code=======";
$endTime = array_sum(explode(" ",microtime()));
error_log("Started time=======".$endTime);
$timeTaken = round(($endTime - $startTime),2);
error_log("Page loaded in $timeTaken seconds");
@CodeGrepperManu