public void Add(ConcurrentIObservableVirtualizingObservableCollection <TestObject> collection)
{
for (var i = 0; i < Iterations; i++)
{
collection.Add(_data[i]);
}
}
public void IterationLong(ConcurrentIObservableVirtualizingObservableCollection <TestObject> collection)
{
var j = 0;
foreach (var item in collection)
{
j++;
if (j > 1000)
{
break;
}
}
}
private void RemoveRandom(ConcurrentIObservableVirtualizingObservableCollection <TestObject> collection)
{
while (!this.IsRandomCanceled)
{
Thread.Sleep(10);
try
{
var removed = collection[1];
this.RemovedObjects.Add(removed);
collection.Remove(removed);
}
catch (ArgumentOutOfRangeException) { }
}
}
public void AsyncVirtualizingObservableCollection()
{
var collection = new ConcurrentIObservableVirtualizingObservableCollection <TestObject>();
collection.CollectionChanged += this.collection_CollectionChanged;
//collection.PropertyChanged += collection_PropertyChanged;
this._testStopwatch.Start("AsyncVirtualizingObservableCollection iterative add with notifications");
for (var i = 0; i < Iterations; i++)
{
collection.Add(_data[i]);
}
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection iterative add without notifications");
collection.SuspendCollectionChangeNotification();
for (var i = 0; i < Iterations; i++)
{
collection.Add(_data[i]);
}
collection.ResumeCollectionChangeNotification();
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection bulk add");
collection.AddRange(_data);
this._testStopwatch.Stop();
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection parallel add with notifications");
Parallel.ForEach(_data, item => { collection.Add(item); });
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection parallel add without notifications");
collection.SuspendCollectionChangeNotification();
Parallel.ForEach(_data, item => { collection.Add(item); });
collection.ResumeCollectionChangeNotification();
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection parallel add int without interlocked");
Parallel.ForEach(_data, item => { collection.Add(item); });
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection Iterative add with parallel read");
Parallel.Invoke(() => this.Add(collection), () => this.Iteration(collection));
this.CheckDataConsistency(collection);
this._testStopwatch.Stop();
this.CheckDataConsistency(collection);
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection Iterative add with parallel read and remove");
var task = Task.Factory.StartNew(() => this.RemoveRandom(collection));
Parallel.Invoke(() => this.Add(collection), () => this.Iteration(collection));
this._testStopwatch.Stop();
this.IsRandomCanceled = true;
task.Wait();
this.CheckDataConsistency(collection);
this.RemovedObjects.Clear();
collection.Clear();
this._testStopwatch.Start("AsyncVirtualizingObservableCollection Iterative add with parallel long read and remove");
task = Task.Factory.StartNew(() => this.RemoveRandom(collection));
Parallel.Invoke(() => this.Add(collection), () => this.IterationLong(collection));
this._testStopwatch.Stop();
this.IsRandomCanceled = true;
task.Wait();
this.CheckDataConsistency(collection);
this.RemovedObjects.Clear();
collection.Clear();
}
