(PHP 4, PHP 5, PHP 7, PHP 8)
getrusage — Obtém a utilização de recursos
$who = ?): arrayEsta é uma interface para getrusage(2). Ela obtém informação retornada pela chamada do sistema.
whoSe who é 1, getrusage será chamada com RUSAGE_CHILDREN.
Retorna um array associativo contendo a informação retornado pela chamada do sistema. Todas entradas são acessíveis usando os seus documentados nomes de campos.
Exemplo #1 Exemplo da getrusage()
<?php
$dat = getrusage();
echo $dat["ru_nswap"]; // number of swaps
echo $dat["ru_majflt"]; // number of page faults
echo $dat["ru_utime.tv_sec"]; // user time used (seconds)
echo $dat["ru_utime.tv_usec"]; // user time used (microseconds)
?>
Nota: Esta função não foi implementada na plataforma Windows.
Note that this function returns rusage of the current process. In a web environment where you have long running apache processes that serve several requests with PHP executions, this will return cumulative timings and is therefore not suitable for telling how much user time your used. The best you could do is to call getrusage() once at the beginning and once at the end and calculate the difference.
BeOS support is removed in PHP 7.3:
https://github.com/php/php-src/blob/php-7.3.0alpha1/NEWS
getrusage() reports kernel counters that are updated only once application loses context and a switch to kernel space happens. For example on modern Linux server kernels that would mean that getrusage() calls would return information rounded at 10ms, desktop kernels - at 1ms.
getrusage() isn't usable for micro-measurements at all - and getmicrotime(true) might be much more valuable resource.
