CommsSerializer high CPU usage

Hello, we are using CommsSerializer to deserialize notifications for compliance recording bot. This method however can take up to a few seconds. Can we do something to reduce this time or optimize? When there is a lot of calls it results in quite high cpu usage.

private CommsNotifications GetGraphNotifications(string rawData)
{
    CommsNotifications result = null;
    try
    {
        #region "Initialization"
        if (string.IsNullOrEmpty(rawData))
        {
            return result;
        }
        #endregion

        Stopwatch stopwatch = new Stopwatch();
        stopwatch.Start();

        result = NotificationProcessor.ExtractNotifications(rawData, new CommsSerializer());

        stopwatch.Stop();
        _logger.LogDebug("GetGraphNotifications execution time: {0} ms", stopwatch.ElapsedMilliseconds);
    }
    catch (Exception ex)
    {
        ErrorAction(GetCurrentMethod(), ex);
    }
    return result;
}

Start at GetGraphNotifications and the NotificationProcessor.ExtractNotifications call shown in the issue, then profile CommsSerializer with representative rawData to identify the CPU and timing bottleneck. Compare any optimization against the existing stopwatch measurement and verify that notification results remain unchanged; done means the reported performance concern is measurably improved.