public static void Test()
{
const int elementCount = 65536;
const int elementExclusiveUpperBound = 1 << 16;
var bufferPool = new BufferPool();
bufferPool.Take <int>(elementCount, out var keys);
bufferPool.Take <int>(elementCount, out var indexMap);
bufferPool.Take <int>(elementCount, out var keys2);
bufferPool.Take <int>(elementCount, out var indexMap2);
bufferPool.Take <int>(elementCount, out var keys3);
bufferPool.Take <int>(elementCount, out var indexMap3);
bufferPool.Take <int>(elementCount, out var keys4);
bufferPool.Take <int>(elementCount, out var indexMap4);
Random random = new Random(5);
for (int iteration = 0; iteration < 4; ++iteration)
{
for (int i = 0; i < elementCount; ++i)
{
indexMap[i] = i;
//keys[i] = i / (elementCount / elementExclusiveUpperBound);
//keys[i] = i % elementExclusiveUpperBound;
//keys[i] = i;
keys[i] = random.Next(elementExclusiveUpperBound);
}
keys.CopyTo(0, keys2, 0, elementCount);
keys.CopyTo(0, keys3, 0, elementCount);
keys.CopyTo(0, keys4, 0, elementCount);
indexMap.CopyTo(0, indexMap2, 0, elementCount);
indexMap.CopyTo(0, indexMap3, 0, elementCount);
indexMap.CopyTo(0, indexMap4, 0, elementCount);
var timer = Stopwatch.StartNew();
var keysScratch = new int[elementCount];
var valuesScratch = new int[elementCount];
var bucketCounts = new int[1024];
for (int t = 0; t < 16; ++t)
{
var comparer = new Comparer();
timer.Restart();
QuickSort.Sort(ref keys[0], ref indexMap[0], 0, elementCount - 1, ref comparer);
//QuickSort.Sort2(ref keys[0], ref indexMap[0], 0, elementCount - 1, ref comparer);
timer.Stop();
VerifySort(ref keys);
Console.WriteLine($"QuickSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
//timer.Restart();
//Array.Sort(keys2.Memory, indexMap2.Memory, 0, elementCount);
//timer.Stop();
//VerifySort(ref keys2);
//Console.WriteLine($"Array.Sort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
timer.Restart();
Array.Clear(bucketCounts, 0, bucketCounts.Length);
LSBRadixSort.SortU16(ref keys3[0], ref indexMap3[0], ref keysScratch[0], ref valuesScratch[0], ref bucketCounts[0], elementCount);
timer.Stop();
VerifySort(ref keys3);
Console.WriteLine($"{t} LSBRadixSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
var originalIndices = new int[256];
timer.Restart();
//MSBRadixSort.SortU32(ref keys4[0], ref indexMap4[0], ref bucketCounts[0], ref originalIndices[0], elementCount, 24);
MSBRadixSort.SortU32(ref keys4[0], ref indexMap4[0], elementCount, SpanHelper.GetContainingPowerOf2(elementExclusiveUpperBound));
timer.Stop();
VerifySort(ref keys4);
Console.WriteLine($"{t} MSBRadixSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
}
}
bufferPool.Clear();
}
public static void Test()
{
void VerifySort <TSpan>(TSpan keys) where TSpan : ISpan <int>
{
for (int i = 1; i < keys.Length; ++i)
{
Debug.Assert(keys[i] >= keys[i - 1]);
}
}
const int elementCount = 65536;
const int elementExclusiveUpperBound = int.MaxValue;// 1 << 5;
var bufferPool = new BufferPool();
var threadDispatcher = new SimpleThreadDispatcher(8);
for (int iteration = 0; iteration < 4; ++iteration)
{
GC.Collect(3, GCCollectionMode.Forced, true);
var keys = new Array <int>(new int[elementCount]);
var indexMap = new Array <int>(new int[elementCount]);
Random random = new Random(5);
for (int i = 0; i < elementCount; ++i)
{
indexMap[i] = i;
//keys[i] = i / (elementCount / elementExclusiveUpperBound);
//keys[i] = i % elementExclusiveUpperBound;
//keys[i] = i;
keys[i] = random.Next(elementExclusiveUpperBound);
}
var keys2 = new Array <int>(new int[elementCount]);
var indexMap2 = new Array <int>(new int[elementCount]);
var keys3 = new Array <int>(new int[elementCount]);
var indexMap3 = new Array <int>(new int[elementCount]);
var keys4 = new Array <int>(new int[elementCount]);
var indexMap4 = new Array <int>(new int[elementCount]);
keys.CopyTo(0, ref keys2, 0, elementCount);
keys.CopyTo(0, ref keys3, 0, elementCount);
keys.CopyTo(0, ref keys4, 0, elementCount);
indexMap.CopyTo(0, ref indexMap2, 0, elementCount);
indexMap.CopyTo(0, ref indexMap3, 0, elementCount);
indexMap.CopyTo(0, ref indexMap4, 0, elementCount);
var timer = Stopwatch.StartNew();
var keysScratch = new int[elementCount];
var valuesScratch = new int[elementCount];
var bucketCounts = new int[1024];
for (int t = 0; t < 16; ++t)
{
keys2.CopyTo(0, ref keys, 0, elementCount);
unsafe
{
var comparer = new Comparer();
fixed(int *keysPointer = keys.Memory)
fixed(int *valuesPointer = indexMap.Memory)
{
var keysBuffer = new Buffer <int>(keysPointer, keys.Length);
var valuesBuffer = new Buffer <int>(valuesPointer, indexMap.Length);
timer.Restart();
QuickSort.Sort(ref keysBuffer[0], ref valuesBuffer[0], 0, elementCount - 1, ref comparer);
}
}
//QuickSort.Sort2(ref keys[0], ref indexMap[0], 0, elementCount - 1, ref comparer);
timer.Stop();
VerifySort(keys);
Console.WriteLine($"QuickSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
//keys.CopyTo(0, ref keys2, 0, elementCount);
//timer.Restart();
//Array.Sort(keys2.Memory, indexMap2.Memory, 0, elementCount);
//timer.Stop();
//VerifySort(keys2);
//Console.WriteLine($"Array.Sort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
keys.CopyTo(0, ref keys3, 0, elementCount);
timer.Restart();
Array.Clear(bucketCounts, 0, bucketCounts.Length);
LSBRadixSort.SortU16(ref keys3[0], ref indexMap3[0], ref keysScratch[0], ref valuesScratch[0], ref bucketCounts[0], elementCount);
timer.Stop();
VerifySort(keys3);
Console.WriteLine($"{t} LSBRadixSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
keys.CopyTo(0, ref keys4, 0, elementCount);
var originalIndices = new int[256];
timer.Restart();
//MSBRadixSort.SortU32(ref keys4[0], ref indexMap4[0], ref bucketCounts[0], ref originalIndices[0], elementCount, 24);
MSBRadixSort.SortU32(ref keys4[0], ref indexMap4[0], elementCount, SpanHelper.GetContainingPowerOf2(elementExclusiveUpperBound));
timer.Stop();
VerifySort(keys4);
Console.WriteLine($"{t} MSBRadixSort time (ms): {timer.Elapsed.TotalSeconds * 1e3}");
}
}
}
