measureWebsocketLatency function

Future<double> measureWebsocketLatency(String wsUrl)

Measure WebSocket connection latency to a given URL

Returns the latency in milliseconds, or double.infinity if the connection fails or times out (after 1000ms).

Implementation

Future<double> measureWebsocketLatency(String wsUrl) async {
  final stopwatch = Stopwatch()..start();
  try {
    final uri = Uri.parse(wsUrl);
    final httpUrl = uri.replace(scheme: uri.scheme == 'wss' ? 'https' : 'http');

    // Try HTTP ping as a proxy for WebSocket latency
    final response = await http
        .get(httpUrl)
        .timeout(const Duration(milliseconds: 5000))
        .catchError((_) => http.Response('', 500));

    stopwatch.stop();

    return response.statusCode < 500
        ? stopwatch.elapsedMilliseconds.toDouble()
        : double.infinity;
  } catch (_) {
    return double.infinity;
  }
}