private function isPerfectCache()
	{
		if ($this->cacheMap[$this->hash] + 0x93a80 > time()) {
			$this->cacheData = json_decode(
				file_get_contents(
					$this->cacheFile
				), 
				true
			);
			return is_array($this->cacheData);
		}
		return false;
	}