FastHashes

FashHashes is a suite of .NET non-cryptographic hash functions.

Main Features

• High Performing: deeply-optimized code makes extensive use of method inlining and unsafe memory pointers in order to speed up the computations.
• Allocation Free: all the internal functions follow a zero-allocation approach, only primitive types and/or arrays of primitive types are used by the algorithms.
• Endian-Agnostic: all the hashes provide consistent results regardless of the machine byte order, while only moderately affecting the overall performance of the computations.
• Platform-Agnostic: the code has been developed under .NET Standard framework and both x86 and x64 environments are fully supported.
• Fully Managed: since version 3.0.0, pointers requiring unsafe memory access contexts have been completely removed and the library is now fully managed.

Hashes

The library includes the following non-cryptographic hashes:

• FarmHash
  • 32/64/128 Bits Output
  • Fingerprint Versions
  • Reference Implementation: https://github.com/google/farmhash
• FastHash
  • 32/64 Bits Output
  • Reference Implementation: https://github.com/ZilongTan/fast-hash
• FastPositiveHash / TH1A
  • 64 Bits Output
  • 0/1/2 Variants
  • Reference Implementation: https://github.com/leo-yuriev/t1ha
• HalfSipHash
  • 32 Bits Output
  • Reference Implementation: https://github.com/veorq/SipHash
• HighwayHash
  • 64/128/256 Bits Output
  • Reference Implementation: https://github.com/google/highwayhash
• KomiHash
  • 64 Bits Output
  • Reference Implementation: https://github.com/avaneev/komihash
• MetroHash
  • 64/128 Bits Output
  • 0/1 Variants
  • Reference Implementation: https://github.com/jandrewrogers/MetroHash
• MirHash
  • 64 Bits Output
  • Reference Implementation: https://github.com/vnmakarov/mir
• MumHash
  • 64 Bits Output
  • Reference Implementation: https://github.com/vnmakarov/mum-hash
• MurmurHash
  • 32/64/128 Bits Output
  • x86/x64 Variants
  • Reference Implementation: https://github.com/aappleby/smhasher
• Mx3Hash
  • 64 Bits Output
  • Reference Implementation: https://github.com/jonmaiga/mx3
• PengyHash
  • 64 Bits Output
  • Strict Variant
  • Reference Implementation: https://github.com/tinypeng/pengyhash
• SipHash
  • 64 Bits Output
  • 1-3/2-4 Variants
  • Reference Implementation: https://github.com/veorq/SipHash
• SpookyHash
  • 32/64/128 Bits Output
  • Reference Implementation: http://burtleburtle.net/bob/hash/spooky.html
• WyHash
  • 32/64 Bits Output
  • Strict Variant
  • Reference Implementation: https://github.com/wangyi-fudan/wyhash
• xxHash
  • 32/64 Bits Output
  • Reference Implementation: https://github.com/Cyan4973/xxHash

Requirements

The following Frameworks are supported:

• Library: .NET Standard 2.0, .NET Standard 2.1
• Auxiliary Projects: .NET Core 2.1, .NET Core 3.1, .NET 5.0, .NET 6.0

The following NuGet packages are required for performing unit tests:

• Microsoft.NET.Test.Sdk
• xunit

Performance Benchmarks

Hash Rank	Hash Name	Bulk Speed Test Average ↓	Chunks Speed Test Average
-	DummyHash (Reference)	609.34 GB/s	2.06 GB/s
1	FarmHash64	11.47 GB/s	626.60 MB/s
2	FarmHash128	11.27 GB/s	641.03 MB/s
3	MetroHash128-V1	11.11 GB/s	636.52 MB/s
4	MetroHash64-V1	11.10 GB/s	628.81 MB/s
5	MetroHash128-V2	11.06 GB/s	635.34 MB/s
6	MetroHash64-V2	11.05 GB/s	620.92 MB/s
7	XxHash64	10.03 GB/s	596.90 MB/s
8	Mx3Hash	9.31 GB/s	545.03 MB/s
9	PengyHash	8.73 GB/s	517.22 MB/s
10	MurmurHash128-x64	6.70 GB/s	485.59 MB/s
11	MurmurHash64-x64	6.56 GB/s	467.14 MB/s
12	XxHash32	6.43 GB/s	482.92 MB/s
13	FastHash64	5.34 GB/s	444.45 MB/s
14	FastHash32	5.26 GB/s	440.91 MB/s
15	WyHash32	4.38 GB/s	389.76 MB/s
16	FarmHash32	4.27 GB/s	394.83 MB/s
17	FastPositiveHash-V1	4.10 GB/s	386.51 MB/s
18	MurmurHash128-x86	4.05 GB/s	383.60 MB/s
19	MurmurHash64-x86	4.01 GB/s	374.73 MB/s
20	FastPositiveHash-V2	3.99 GB/s	386.33 MB/s
21	MurmurHash32	2.82 GB/s	332.35 MB/s
22	MumHash	2.44 GB/s	312.24 MB/s
23	WyHash64	2.39 GB/s	340.13 MB/s
24	KomiHash	2.31 GB/s	331.88 MB/s
25	FastPositiveHash-V0	2.29 GB/s	320.69 MB/s
26	MirHash	2.03 GB/s	298.14 MB/s
27	SipHash-13	1.28 GB/s	230.67 MB/s
28	HighwayHash256	914.16 MB/s	125.78 MB/s
29	HighwayHash64	899.65 MB/s	151.54 MB/s
30	HighwayHash128	883.51 MB/s	143.84 MB/s
31	SpookyHash32	752.43 MB/s	156.79 MB/s
32	SpookyHash64	734.84 MB/s	149.36 MB/s
33	SipHash-24	734.74 MB/s	168.43 MB/s
34	SpookyHash128	723.91 MB/s	155.67 MB/s
35	HalfSipHash	364.78 MB/s	119.96 MB/s

The tests above have been conducted with the following machine setup:

• CPU: Intel Core i7-7700HQ @2.80GHz (4 Cores, 8 Threads, 256KB L1 Cache)
• RAM: 16 GB x DDR4 SO-DIMM @1200MHz
• OS: Microsoft Windows 10 64-Bit