public void TestWeakConcurrentDictionaryReferencesObservable()
{
const int elements = 100000;
Random random = new Random();
WeakConcurrentDictionary<int, ObservableTestClass> weakConcurrentDictionary =
new WeakConcurrentDictionary<int, ObservableTestClass>(allowResurrection: false);
ConcurrentDictionary<int, ObservableTestClass> referenceDictionary =
new ConcurrentDictionary<int, ObservableTestClass>();
int nullCount = 0;
int unreferencedNullCount = 0;
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
Parallel.For(
0,
elements,
l =>
{
// Include nulls ~25% of the time.
ObservableTestClass t;
if (random.Next(4) < 3)
t = new ObservableTestClass(random.Next(int.MinValue, int.MaxValue));
else
{
t = null;
Interlocked.Increment(ref nullCount);
}
weakConcurrentDictionary.Add(l, t);
// Only keep references ~33% of the time.
if (random.Next(3) == 0)
referenceDictionary.AddOrUpdate(l, t, (k, v) => t);
else if (t == null)
Interlocked.Increment(ref unreferencedNullCount);
});
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Populating dictionaries with {0} elements", elements));
//GC.WaitForFullGCComplete(5000);
stopwatch.Restart();
long bytes = GC.GetTotalMemory(true);
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Garbage collection"));
Trace.WriteLine(string.Format("Memory: {0}K", bytes / 1024));
// Check that we have l
Assert.IsTrue(referenceDictionary.Count <= elements);
int refCount = referenceDictionary.Count;
stopwatch.Restart();
int weakCount = weakConcurrentDictionary.Count;
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Counting '{0}' elements", weakCount));
stopwatch.Restart();
weakCount = weakConcurrentDictionary.Count;
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Counting '{0}' elements again", weakCount));
int floor = refCount + unreferencedNullCount;
Trace.WriteLine(
string.Format(
"Referenced Dictionary Count: {1}{0}Weak Dictionary Count: {2}{0}Null values: {3} (unreferenced: {4}){0}Garbage Collected: {5}{0}Pending Collection: {6}{0}",
Environment.NewLine,
refCount,
weakCount,
nullCount,
unreferencedNullCount,
elements - weakCount,
weakCount - floor
));
// Check we only have references to referenced elements.
Assert.AreEqual(refCount + unreferencedNullCount, weakCount);
// Check everything that's still referenced is available.
stopwatch.Restart();
Parallel.ForEach(
referenceDictionary,
kvp =>
{
ObservableTestClass value;
Assert.IsTrue(weakConcurrentDictionary.TryGetValue(kvp.Key, out value));
Assert.AreEqual(kvp.Value, value);
});
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Checking '{0}' elements", weakCount));
}
public void TestWeakConcurrentDictionaryReferencesObservable()
{
const int elements = 100000;
Random random = new Random();
WeakConcurrentDictionary <int, ObservableTestClass> weakConcurrentDictionary =
new WeakConcurrentDictionary <int, ObservableTestClass>(allowResurrection: false);
ConcurrentDictionary <int, ObservableTestClass> referenceDictionary =
new ConcurrentDictionary <int, ObservableTestClass>();
int nullCount = 0;
int unreferencedNullCount = 0;
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
Parallel.For(
0,
elements,
l =>
{
// Include nulls ~25% of the time.
ObservableTestClass t;
if (random.Next(4) < 3)
{
t = new ObservableTestClass(random.Next(int.MinValue, int.MaxValue));
}
else
{
t = null;
Interlocked.Increment(ref nullCount);
}
weakConcurrentDictionary.Add(l, t);
// Only keep references ~33% of the time.
if (random.Next(3) == 0)
{
referenceDictionary.AddOrUpdate(l, t, (k, v) => t);
}
else if (t == null)
{
Interlocked.Increment(ref unreferencedNullCount);
}
});
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Populating dictionaries with {0} elements", elements));
//GC.WaitForFullGCComplete(5000);
stopwatch.Restart();
long bytes = GC.GetTotalMemory(true);
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Garbage collection"));
Trace.WriteLine(string.Format("Memory: {0}K", bytes / 1024));
// Check that we have l
Assert.IsTrue(referenceDictionary.Count <= elements);
int refCount = referenceDictionary.Count;
stopwatch.Restart();
int weakCount = weakConcurrentDictionary.Count;
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Counting '{0}' elements", weakCount));
stopwatch.Restart();
weakCount = weakConcurrentDictionary.Count;
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Counting '{0}' elements again", weakCount));
int floor = refCount + unreferencedNullCount;
Trace.WriteLine(
string.Format(
"Referenced Dictionary Count: {1}{0}Weak Dictionary Count: {2}{0}Null values: {3} (unreferenced: {4}){0}Garbage Collected: {5}{0}Pending Collection: {6}{0}",
Environment.NewLine,
refCount,
weakCount,
nullCount,
unreferencedNullCount,
elements - weakCount,
weakCount - floor
));
// Check we only have references to referenced elements.
Assert.AreEqual(refCount + unreferencedNullCount, weakCount);
// Check everything that's still referenced is available.
stopwatch.Restart();
Parallel.ForEach(
referenceDictionary,
kvp =>
{
ObservableTestClass value;
Assert.IsTrue(weakConcurrentDictionary.TryGetValue(kvp.Key, out value));
Assert.AreEqual(kvp.Value, value);
});
stopwatch.Stop();
Trace.WriteLine(stopwatch.ToString("Checking '{0}' elements", weakCount));
}