public void FastDuplicateTest()
{
var polyCrv = new PolyCurve(new Line(0, 0, 10, 10));
polyCrv.AddArc(new Vector(10, 0));
polyCrv.Add(new PolyLine(new Vector(10, 0), new Vector(5, 0), new Vector(5, -5)));
for (int i = 0; i < 1000; i++)
{
var polyCrv2 = polyCrv.FastDuplicate();
Assert.AreEqual(polyCrv.Length, polyCrv2.Length);
}
}