/**
* Purges half of the items in the cache, removing the least recently used.
*/
private static function purgeLru()
{
usort(self::$statCache, function ($a, $b) {
return $a['time'] > $b['time'] ? 1 : ($a['time'] < $b['time'] ? -1 : 0);
});
self::$statCache = array_slice(self::$statCache, 0, 500);
}
