Question:
I would like to know how long it takes for a particular function, loop loop, etc… to run. I resorted to the microtime() function, but I get a little lost to know exactly how much time was spent. And my questions are as follows:
1- How can I convert microseconds into seconds? So that it's a little legible and you get a sense of how much time was spent during execution.
<?php
$tempoInicial = round(microtime(true) * 1000);
$var = 100000;
for ($i=0; $i < $var; $i++) {
echo "$i -> ";
}
$tempoFinal = round(microtime(true) * 1000);
$total = $tempoFinal - $tempoInicial;
echo "Resultado: Tempo inicial: $tempoInicial <br> Tempo final:
$tempoFinal <br> Total: $total";
2- There is some tool or resource available for PHP that can check in real time something like the execution speed of the script, of a function, loop loop, etc.
Answer:
Microsecond (mS) is a multiple of the second, a unit of time, prefixed by the base standards micro multiplier (µ), equal to 0.000001 second(1 microsecond = 1.0E-6 seconds). So to get the time in seconds, you should divide by 1000000.
Starting with PHP 5 you can use microtime at the beginning and end of your code:
<?php
$inicio = microtime(true);
sleep(1);
$fim = microtime(true);
$tempo = $fim - $inicio;
printf("Processado em: %0.16f segundos", $tempo/1000000);
?>
See it working: https://paiza.io/projects/udZy3WdDvQ4kYrUj7AGSSQ
As of PHP 5.4.0 , there is no need to start the start time, the $_SERVER["REQUEST_TIME_FLOAT"] already has it:
<?php
sleep(1);
$tempo = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];
printf("Processado em: %0.16f segundos", $tempo/1000000);
?>
See Working: https://paiza.io/projects/JhDm9gJcBiFOu7hL_4ydtg
References