public void LengthTimesLengthEqualsArea()
{
var m1 = new Metres(1);
var m2 = new Metres(1);
Area a = m1 * m2;
Assert.AreEqual(1, a, 1e-6);
}
public void VolumeDividedByLengthEqualsArea()
{
Volume volume = new CubicMetres(1);
Length length = new Metres(1);
Area area = volume / length;
Assert.AreEqual(1, area, 1e-6);
}
public void LengthDividedByLengthEqualsValue()
{
var m1 = new Metres(4);
var m2 = new Metres(20);
double v = m1 / m2;
Assert.AreEqual(0.2, v, 1e-6);
}
public void LengthTimesAreaEqualsVolume()
{
Area area = new SquareMetres(1);
Length length = new Metres(1);
Volume volume = length * area;
Assert.AreEqual(1, volume, 1e-6);
}
static MetresPerSecond DoMathsWithStructs()
{
Metres tenKms = 10 * 1000;
Seconds oneHour = 60 * 60;
return(tenKms / oneHour);
}
public void AreaTimesLengthEqualsVolume()
{
Area area = new SquareMetres(1);
Length length = new Metres(1);
Volume volume = area * length;
Assert.AreEqual(1, volume, 1e-6);
}
public void MetresToFeet()
{
Metres m = new Metres(1);
Feet ft = (new Feet(0)).From(m);
// 1 metre = 3.2808399 feet (3 feet 3⅜ inches)
Assert.AreEqual(3.2808399, ft.Value, 4);
}
static void Main(string[] args)
{
// ----- Memory -----
WriteLine("Press enter to start memory stats");
ReadLine();
var baseline = GC.GetTotalMemory(forceFullCollection: true);
var darray = new double[1000000];
var after = GC.GetTotalMemory(forceFullCollection: true);
WriteLine("array of a million doubles is {0} bytes\n", after - baseline);
baseline = GC.GetTotalMemory(forceFullCollection: true);
var marray = new Metres[1000000];
after = GC.GetTotalMemory(forceFullCollection: true);
WriteLine("array of a million Metres is {0} bytes\n", after - baseline);
GC.KeepAlive(darray);
GC.KeepAlive(marray);
// ----- Cpu -----
Console.WriteLine("Press enter for maths");
Console.ReadLine();
for (int i = 0; i < 1000; i++) // "warmup" JIT
{
DoMaths();
DoMathsWithStructs();
}
var sw = Stopwatch.StartNew();
for (int i = 0; i < 50000000; i++)
{
DoMaths();
}
sw.Stop();
WriteLine($"raw maths took {sw.ElapsedMilliseconds}ms");
sw.Restart();
for (int i = 0; i < 50000000; i++)
{
DoMathsWithStructs();
}
sw.Stop();
WriteLine($"struct maths took {sw.ElapsedMilliseconds}ms");
}
static void Main(string[] args)
{
// ----- Memory -----
WriteLine("Press enter to start memory stats");
ReadLine();
var baseline = GC.GetTotalMemory(forceFullCollection: true);
var darray = new double[1000000];
var after = GC.GetTotalMemory(forceFullCollection: true);
WriteLine("array of a million doubles is {0} bytes\n", after - baseline);
baseline = GC.GetTotalMemory(forceFullCollection: true);
var marray = new Metres[1000000];
after = GC.GetTotalMemory(forceFullCollection: true);
WriteLine("array of a million Metres is {0} bytes\n", after - baseline);
GC.KeepAlive(darray);
GC.KeepAlive(marray);
// ----- Cpu -----
Console.WriteLine("Press enter for maths");
Console.ReadLine();
for (int i = 0; i < 1000; i++) { // "warmup" JIT
DoMaths();
DoMathsWithStructs();
}
var sw = Stopwatch.StartNew();
for(int i = 0; i < 50000000; i++)
DoMaths();
sw.Stop();
WriteLine($"raw maths took {sw.ElapsedMilliseconds}ms");
sw.Restart();
for (int i = 0; i < 50000000; i++)
DoMathsWithStructs();
sw.Stop();
WriteLine($"struct maths took {sw.ElapsedMilliseconds}ms");
}
//-----------------------------------------------------------------------------------------------
// Object
//-----------------------------------------------------------------------------------------------
public override int GetHashCode()
{
return(Metres.GetHashCode());
}
public override string ToString()
{
return($"{Metres.ToString("#,##0")}m ({Feet.ToString("#,##0")}ft)");
}
public int CompareTo(Height other)
{
return(Metres.CompareTo(other.Metres));
}
public int CompareTo(Length other) => Metres.CompareTo(other.Metres);
