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swiss ok, needs more benchmark

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This commit is contained in:
Youmu Liu
2026-03-06 18:22:30 +08:00
parent 83997f64d0
commit f6e897ed06
70 changed files with 1889 additions and 3371 deletions
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StgSharp.Common/Collections/SwissTable.cs
+58 -29
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@@ -2,8 +2,8 @@
// -----------------------------------------------------------------------
// file="SwissTable"
// Project: StgSharp
// AuthorGroup: Nitload Space
// Copyright (c) Nitload Space. All rights reserved.
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
@@ -41,41 +41,51 @@ namespace StgSharp.Collections
{
private const int BucketCount = 1 << EntryMaskWidth;
private const int BucketSize = 256;
private const int EntryMaskWidth = 10; // 1024 entries total, 256 per bucket
public const int MaxCapacity = 1024 * BucketSize; // 256 entries per bucket, 1024 buckets
private const int BucketSize = 16;
private const uint CrcMagic = 0xffff9961; // Magic number for CRC32C, used in hash computation
private const int EntryMaskWidth = 16; // 65536 entries total, 16 per bucket
public const int MaxCapacity = BucketCount * BucketSize; // 256 entries per bucket, 1024 buckets
private readonly Entry* _entries;
private SwissTable(Entry* buffer)
private SwissTable(
Entry* buffer
)
{
_entries = buffer;
for (int i = 0; i < BucketCount; i++)
{
// Set all control bytes to 0xFF (empty)
Unsafe.InitBlock(&_entries[i].Bucket.Control, 0xFF, BucketSize);
}
}
public static SwissTable Create()
{
Entry* buffer = (Entry*)NativeMemory.AlignedAlloc((nuint)Marshal.SizeOf<Entry>(), 16);
Entry* buffer = (Entry*)NativeMemory.AlignedAlloc((nuint)Unsafe.SizeOf<Entry>(), 16);
for (int i = 0; i < BucketCount; i++)
{
// Set all control bytes to 0xFF (empty)
Unsafe.InitBlock(&(*buffer)[i].Control, 0xFF, BucketSize);
}
return new SwissTable(buffer);
}
public bool TryAddOrSet(nint key, nint value, out bool isNewKey)
public bool TryAddOrSet(
nint key,
nint value,
out bool isNewKey
)
{
uint hash = BitOperations.Crc32C(0xffff9961, (ulong)key);
short entry = (short)(hash & ((1 << 11) - 1));
Bucket* bucket = &_entries[entry].Bucket;
uint hash = BitOperations.Crc32C(CrcMagic, (ulong)key);
ushort entry = (ushort)(hash & (BucketCount - 1));
Bucket* bucket = &(*_entries)[entry];
return IBucketScanner.Current.TrySet(key, hash, bucket, value, out isNewKey);
}
public bool TryGet(nint key, out nint value)
public bool TryGet(
nint key,
out nint value
)
{
uint hash = BitOperations.Crc32C(0xffff9961, (ulong)key);
short entry = (short)(hash & ((1 << 11) - 1));
Bucket* bucket = &_entries[entry].Bucket;
uint hash = BitOperations.Crc32C(CrcMagic, (ulong)key);
ushort entry = (ushort)(hash & (BucketCount - 1));
Bucket* bucket = &(*_entries)[entry];
return IBucketScanner.Current.TryFind(key, hash, bucket, out value);
/*
* hash = CRC32 of key
@@ -86,11 +96,14 @@ namespace StgSharp.Collections
*/
}
public bool TryRemove(nint key, out nint value)
public bool TryRemove(
nint key,
out nint value
)
{
uint hash = BitOperations.Crc32C(0xffff9961, (ulong)key);
short entry = (short)(hash & ((1 << 11) - 1));
Bucket* bucket = &_entries[entry].Bucket;
uint hash = BitOperations.Crc32C(CrcMagic, (ulong)key);
ushort entry = (ushort)(hash & (BucketCount - 1));
Bucket* bucket = &(*_entries)[entry];
return IBucketScanner.Current.TryRemove(key, hash, bucket, out value);
}
@@ -121,15 +134,31 @@ namespace StgSharp.Collections
static IBucketScanner Current { get; } = Create();
bool TryFind(nint key, uint Hash, Bucket* bucket, out nint value);
bool TryFind(
nint key,
uint Hash,
Bucket* bucket,
out nint value
);
unsafe bool TryRemove(nint key, uint hash, Bucket* bucket, out nint value);
unsafe bool TryRemove(
nint key,
uint hash,
Bucket* bucket,
out nint value
);
bool TrySet(nint key, uint hash, Bucket* bucket, nint value, out bool isNewKey);
bool TrySet(
nint key,
uint hash,
Bucket* bucket,
nint value,
out bool isNewKey
);
private static IBucketScanner Create()
{
if (X86Base.IsSupported)
if (Sse42.IsSupported)
{
return new BucketScannerX86();
} else if (ArmBase.IsSupported)