public void BeginTest()
{
var count = 10000000;
Point2D[] point2Ds = new Point2D[count];
Point2DStruct[] point2DStructs = new Point2DStruct[count];
//Create a load of point2D in heap and a load of point2DStruct in the stack.
for (int i = 0; i < count; ++i)
{
point2Ds[i] = new Point2D {
X = i, Y = 10
};
point2DStructs[i] = new Point2DStruct {
X = i, Y = 10
};
}
UpdatePoint2DY(point2Ds[1], 1);
UpdatePoint2DStructY(ref point2DStructs[1], 1);
//Next, we are going retrieve and update values in both and time it.
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
for (int i = 0; i < count; i++)
{
UpdatePoint2DY(point2Ds[i], i);
}
long point2DTime = stopwatch.ElapsedMilliseconds;
stopwatch.Restart();
for (int i = 0; i < count; i++)
{
//Passing a ref to the value type to ensure a copy is not made.
UpdatePoint2DStructY(ref point2DStructs[i], i);
}
long point2DStructTime = stopwatch.ElapsedMilliseconds;
Console.WriteLine($"Struct:{point2DStructTime} Class:{point2DTime}");
Console.ReadKey();
}
void UpdatePoint2DStructY(ref Point2DStruct point2DStruct, int count)
{
point2DStruct.Y = count;
}
