public IEnumerable <Task <double> > GetValues()
{
while (true)
{
yield return(Task.FromResult(-1d));
yield return(SensorData.GetDataAsync("iddqd"));
yield return(SensorData.GetDataAsync("idkfa"));
}
}
public async Task Tasks_FromAsync()
{
var ids = new string[] { "iddqd", "idkfq", "abba5", "acdc1" };
var tasks = new List <Task <double> >();
foreach (var id in ids)
{
var dataTask = SensorData.GetDataAsync(id);
tasks.Add(dataTask);
}
var results = await Task.WhenAll(tasks);
}
public async Task Tasks_FromAsync()
{
var ids = new string[] { "iddqd", "idkfq", "abba5", "acdc1" };
var tasks = new List <Task <double> >();
foreach (var id in ids)
{
var dataTask = SensorData.GetDataAsync(id);
tasks.Add(dataTask);
}
var results = await Task.WhenAll(tasks);
var tasksLinq = ids.Select(e => SensorData.GetSensorAsync(e)).ToList();
var results2 = await Task.WhenAll(tasksLinq);
// Select is lazy, but now tasksLinq is a List
var high = tasksLinq.Where(e => e.Result.Data > 10).ToList();
}
public async Task AsyncAwait_Comparison()
{
// Warmup
SensorData.GetDataSync("iddqd");
await SensorData.GetDataAsync("iddqd");
var sw = Stopwatch.StartNew();
var syncResult1 = SensorData.GetDataSync("iddqd");
var syncResult2 = SensorData.GetDataSync("idkfa");
var syncResult3 = SensorData.GetDataSync("abba5");
var syncResult4 = SensorData.GetDataSync("acdc1");
var syncTime = sw.ElapsedMilliseconds;
sw = Stopwatch.StartNew();
var r1 = await SensorData.GetDataAsync("iddqd");
var r2 = await SensorData.GetDataAsync("idkfa");
var r3 = await SensorData.GetDataAsync("abba5");
var r4 = await SensorData.GetDataAsync("acdc1");
var asyncTime = sw.ElapsedMilliseconds;
sw = Stopwatch.StartNew();
var t1 = SensorData.GetDataAsync("iddqd");
var t2 = SensorData.GetDataAsync("idkfa");
var t3 = SensorData.GetDataAsync("abba5");
var t4 = SensorData.GetDataAsync("acdc1");
var results = await Task.WhenAll(t1, t2, t3, t4);
var awaitTime = sw.ElapsedMilliseconds;
}
