TransferStats example

if ($body->isSeekable()) {
            $body->rewind();
        }

        return new FulfilledPromise($easy->response);
    }

    private static function invokeStats(EasyHandle $easy): void
    {
        $curlStats = \curl_getinfo($easy->handle);
        $curlStats['appconnect_time'] = \curl_getinfo($easy->handle, \CURLINFO_APPCONNECT_TIME);
        $stats = new TransferStats(
            $easy->request,
            $easy->response,
            $curlStats['total_time'],
            $easy->errno,
            $curlStats
        );
        ($easy->options['on_stats'])($stats);
    }

    /** * @param callable(RequestInterface, array): PromiseInterface $handler */

/** * @param mixed $reason Promise or reason. */
    private function invokeStats(
        RequestInterface $request,
        array $options,
        ResponseInterface $response = null,
        $reason = null
    ): void {
        if (isset($options['on_stats'])) {
            $transferTime = $options['transfer_time'] ?? 0;
            $stats = new TransferStats($request, $response, $transferTime, $reason);
            ($options['on_stats'])($stats);
        }
    }
}

    }

    private function invokeStats(
        array $options,
        RequestInterface $request,
        ?float $startTime,
        ResponseInterface $response = null,
        \Throwable $error = null
    ): void {
        if (isset($options['on_stats'])) {
            $stats = new TransferStats($request, $response, Utils::currentTime() - $startTime, $error, []);
            ($options['on_stats'])($stats);
        }
    }

    /** * @param resource $stream */
    private function createResponse(RequestInterface $request, array $options, $stream, ?float $startTime): PromiseInterface
    {
        $hdrs = $this->lastHeaders;
        $this->lastHeaders = [];