Supported Versions: PHP 7 >= 7.3.0, PHP 8
Get the system's high resolution time
<?php hrtime(bool $as_number = false): array|int|float|false
<?php         $lastRestart = $this->getTimestampOfLastQueueRestart();



        [$startTime, $jobsProcessed] = [hrtime(true) / 1e9, 0];



        while (true) {
<?php             $this->memoryExceeded($options->memory) => static::EXIT_MEMORY_LIMIT,

            $this->queueShouldRestart($lastRestart) => static::EXIT_SUCCESS,

            $options->stopWhenEmpty && is_null($job) => static::EXIT_SUCCESS,

            $options->maxTime && hrtime(true) / 1e9 - $startTime >= $options->maxTime => static::EXIT_SUCCESS,

            $options->maxJobs && $jobsProcessed >= $options->maxJobs => static::EXIT_SUCCESS,

            default => null

        };
<?php             return collect(range(1, $iterations))->map(function () use ($callback) {

                gc_collect_cycles();



                $start = hrtime(true);



                $callback();
<?php                 $callback();



                return (hrtime(true) - $start) / 1000000;

            })->average();

        })->when(

            $benchmarkables instanceof Closure,
<?php     {

        gc_collect_cycles();



        $start = hrtime(true);



        $result = $callback();
<?php         $result = $callback();



        return [$result, (hrtime(true) - $start) / 1000000];

    }