| | static class Program
{
struct ValueHolder
{
private readonly long _value;
public ValueHolder(long value)
{
_value = value;
}
}
struct ValueHolderNullable
{
private readonly long? _value;
public ValueHolderNullable(long? value)
{
_value = value;
}
}
static void Main(string[] args)
{
Console.WindowWidth = 120;
var data = Enumerable.Range(0, 10000)
.Select(i => (long)i % 1000)
.ToArray();
var data2 = data.Select(l => new ValueHolder(l)).ToArray();
var data3 = data.Select(l => new ValueHolderNullable(l)).ToArray();
// Замеры начались
Measure("Raw", () =>
{
data.Distinct().ToArray();
return data.Length;
});
Measure("Wrapper", () =>
{
data2.Distinct().ToArray();
return data2.Length;
});
Measure("NullableWrapper", () =>
{
data3.Distinct().ToArray();
return data3.Length;
});
// Замеры закончились
Console.WriteLine("Done.");
Console.ReadKey();
}
static void Measure(string name, Func<long> callback)
{
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
var mem = GC.GetTotalMemory(true);
var gc00 = GC.CollectionCount(0);
var gc01 = GC.CollectionCount(1);
var gc02 = GC.CollectionCount(2);
var sw = Stopwatch.StartNew();
var result = callback();
sw.Stop();
var mem2 = GC.GetTotalMemory(false);
var gc10 = GC.CollectionCount(0);
var gc11 = GC.CollectionCount(1);
var gc12 = GC.CollectionCount(2);
var memDelta = (mem2 - mem) / 1024.0;
var gcDelta0 = gc10 - gc00;
var gcDelta1 = gc11 - gc01;
var gcDelta2 = gc12 - gc02;
Console.WriteLine(
"{0,20}: {1,5}ms, ips: {2,22:N} | Mem: {3,9:N2} kb, GC 0/1/2: {4}/{5}/{6} => {7,6}",
name, sw.ElapsedMilliseconds, result / sw.Elapsed.TotalSeconds, memDelta, gcDelta0, gcDelta1, gcDelta2, result);
}
}
|
