public void WritePerformanceDirect()
{
const int width = 150;
const int height = 150;
var grid = new int[width, height];
var immutableGrid = ImmutableGrid <int> .Create(width, height);
var gridTime = BenchmarkHelper(
width, height, (x, y) => grid[x, y] = x + y);
var immutableGridTime = BenchmarkHelper(
width, height, (x, y) => immutableGrid.Set(x, y, x + y));
// Use the builder for many updates :)
// This looks ugly but still 1/2 time of nested immutable
// dictionary
var factor = immutableGridTime / gridTime;
#if DEBUG
Assert.IsTrue(factor < 800, "Factor was " + factor);
#else
Assert.IsTrue(factor < 700, "Factor was " + factor);
#endif
}
public void CreateReferenceType()
{
var grid = ImmutableGrid <object> .Create(10, 20);
Assert.AreEqual(10, grid.Width);
Assert.AreEqual(20, grid.Height);
Assert.IsTrue(grid.All(x => x.Item2 == default(object)));
}
public void CreateValueType()
{
var grid = ImmutableGrid <int> .Create(10, 20);
Assert.AreEqual(10, grid.Width);
Assert.AreEqual(20, grid.Height);
Assert.IsTrue(grid.All(x => x.Item2 == default(int)));
}
public void Set()
{
var source = ImmutableGrid <int> .Create(2, 2).Set(0, 0, 5);
var grid = source.Set(0, 0, 6);
Assert.AreEqual(6, grid[0, 0]);
Assert.AreEqual(5, source[0, 0]);
}
public void Indexer()
{
var grid = ImmutableGrid <int>
.Create(2, 2)
.Set(0, 0, 5)
.Set(0, 1, 6);
Assert.AreEqual(5, grid[0, 0]);
Assert.AreEqual(6, grid[0, 1]);
}
public void ToBuilder()
{
var source = ImmutableGrid <int> .Create(2, 2).Set(0, 0, 5);
var grid = source.ToBuilder().Set(1, 1, 3).Build();
Assert.AreEqual(5, grid[0, 0]);
Assert.AreEqual(3, grid[1, 1]);
Assert.AreEqual(5, source[0, 0]);
Assert.AreEqual(default(int), source[1, 1]);
}
public void ReadPerformance()
{
const int width = 150;
const int height = 150;
var grid = new int[width, height];
var immutableGrid = ImmutableGrid <int> .Create(width, height);
var gridTime = BenchmarkHelper(
width, height, (x, y) => { var cell = grid[x, y]; });
var immutableGridTime = BenchmarkHelper(
width, height, (x, y) => { var cell = immutableGrid[x, y]; });
var factor = immutableGridTime / gridTime;
#if DEBUG
Assert.IsTrue(factor < 5, "Factor was " + factor);
#else
Assert.IsTrue(factor < 2, "Factor was " + factor);
#endif
}