DnsCache example

public array $pauseExpiries = [];
    public int $execCounter = \PHP_INT_MIN;
    public ?LoggerInterface $logger = null;

    public static array $curlVersion;

    public function __construct(int $maxHostConnections, int $maxPendingPushes)
    {
        self::$curlVersion ??= curl_version();

        $this->handle = curl_multi_init();
        $this->dnsCache = new DnsCache();
        $this->reset();

        // Don't enable HTTP/1.1 pipelining: it forces responses to be sent in order         if (\defined('CURLPIPE_MULTIPLEX')) {
            curl_multi_setopt($this->handle, \CURLMOPT_PIPELINING, \CURLPIPE_MULTIPLEX);
        }
        if (\defined('CURLMOPT_MAX_HOST_CONNECTIONS')) {
            $maxHostConnections = curl_multi_setopt($this->handle, \CURLMOPT_MAX_HOST_CONNECTIONS, 0 < $maxHostConnections ? $maxHostConnections : \PHP_INT_MAX) ? 0 : $maxHostConnections;
        }
        if (\defined('CURLMOPT_MAXCONNECTS') && 0 < $maxHostConnections) {
            curl_multi_setopt($this->handle, \CURLMOPT_MAXCONNECTS, $maxHostConnections);
        }