Uniqid performance

uniqid

$start = microtime(true);

for ($i = 0; $i < 50000; $i++) { uniqid("NEW"); }

$stop = microtime(true);

$result = $stop-$start;

echo "50000: " . $result . "s\n";
echo "1op " . $result / 50000 . "s\n";

$start = microtime(true);

for ($i = 0; $i < 50000; $i++) { uniqid("NEW", true); }

$stop = microtime(true);

$result = $stop-$start;
echo "TRUE\n";
echo "50000: " . $result . "s\n";
echo "1op " . $result / 50000 . "s\n";



==============
RESULTS on PHP 5.5.3-1ubuntu2.3 (cli), without virtualization

50000: 3.0598292350769s
1op 6.1196584701538E-5s
TRUE
50000: 0.10254096984863s
1op 2.0508193969727E-6s


On windows 7 on virtual machine
====
50000: 0.28189897537231s
1op 5.6379795074463E-6s
TRUE
50000: 0.3240339756012s
1op 6.4806795120239E-6s