Json.NET serialize measurement

int trialCount = 10;

DateTimeOffset start;
DateTimeOffset stop;

double serializeTotal = 0;
double deserializeTotal = 0;
for (int i = 0; i < trialCount; i++)
{
    start = DateTimeOffset.UtcNow;
    string profileJson = JsonConvert.SerializeObject(profile, RestClientProvider.SerializerSettingsForHeaders);
    stop = DateTimeOffset.UtcNow;

    double serializeTime = stop.Subtract(start).TotalMilliseconds;

    serializeTotal += serializeTime;

    Log.LogDebug($"Serialize {serializeTime}ms");

    start = DateTimeOffset.UtcNow;
    object profile2 = JsonConvert.DeserializeObject<MobileProfile>(profileJson, RestClientProvider.SerializerSettingsForHeaders);
    stop = DateTimeOffset.UtcNow;

    double deserializeTime = stop.Subtract(start).TotalMilliseconds;

    Log.LogDebug($"Deserialize {deserializeTime}ms");

    deserializeTotal += deserializeTime;
}

double serializeAvg = serializeTotal / trialCount;
double deserializeAvg = deserializeTotal / trialCount;

Log.LogDebug($"Serialize Average {serializeAvg}ms");
Log.LogDebug($"Deserialize Average {deserializeAvg}ms");