round

<?php     $t = microtime(true);

    $connection->on('close', function () use ($connection, $t, &$bytes) {

        $t = microtime(true) - $t;

        echo '[' . $connection->getRemoteAddress() . ' disconnected after receiving ' . $bytes . ' bytes in ' . round($t, 3) . 's => ' . round($bytes / $t / 1024 / 1024, 1) . ' MiB/s]' . PHP_EOL;

    });

});

<?php         if ($ulimit * 600 > $memory) {

            $this->markTestSkipped('Test requires ~' . round($ulimit * 600 / 1024 / 1024) . '/' . round($memory / 1024 / 1024) . ' MiB memory with ' . $ulimit . ' file descriptors');

        }