Hawkynt

xxHash3

Ultra-fast non-cryptographic hash function optimized for speed and quality. Latest generation of xxHash family with improved performance on small data and better distribution properties.

Properties

Property	Value
Category	Hash Functions
Sub-category	Fast Hash
Security status	🎓 Educational Only
Complexity	Not specified
Inventor	Yann Collet
Year	2019
Origin	Not specified
Source	algorithms/hash/xxhash3.js

Parameters

Parameter	Supported values
Output sizes	8 bytes (64 bits); 16 bytes (128 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Cryptographic Weakness	Not designed for cryptographic use - vulnerable to deliberate collision attacks	Use only for non-cryptographic applications like hash tables and checksums

Documentation

• xxHash Official Website
• GitHub Repository
• Algorithm Documentation

References

• Reference Implementation
• Official sanity test vectors
• SMHasher Test Results

Test vectors

30 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — XXH3-64 len=0, seed 0

Field	Value
outputSize	8
input	(empty)
expected	2d06800538d394c2

Vector 2 — XXH3-64 len=1, seed 0

Field	Value
outputSize	8
input	00
expected	c44bdff4074eecdb

Vector 3 — XXH3-64 len=3, seed 0

Field	Value
outputSize	8
input	005292
expected	54247382a8d6b94d

Vector 4 — XXH3-64 len=4, seed 0

Field	Value
outputSize	8
input	0052929b
expected	e5dc74bc51848a51

Vector 5 — XXH3-64 len=8, seed 0

Field	Value
outputSize	8
input	0052929bb732a324
expected	24ccc9acaa9f65e4

Vector 6 — XXH3-64 len=9, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d
expected	14d5001c15dd3f2b

Vector 7 — XXH3-64 len=16, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893
expected	981b17d36c7498c9

Vector 8 — XXH3-64 len=17, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893e3
expected	796f5acd3a60f862

Vector 9 — XXH3-64 len=128, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096
expected	fcff24126754d861

Vector 10 — XXH3-64 len=129, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f3
expected	98f1b0a679a2ca29

Vector 11 — XXH3-64 len=240, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8
expected	81c3c2b67f568ccf

Vector 12 — XXH3-64 len=241, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8 e5
expected	c5a639ecd2030e5e

Vector 13 — XXH3-64 len=1024, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 … (1024 bytes; the full value is in the source)
expected	dd85c9b5c1109c5c

Vector 14 — XXH3-64 len=2048, seed 0

Field	Value
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 … (2048 bytes; the full value is in the source)
expected	dd59e2c3a5f038e0

Vector 15 — XXH3-64 len=0, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	(empty)
expected	a8a6b918b2f0364a

Vector 16 — XXH3-64 len=1, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	00
expected	032be332dd766ef8

Vector 17 — XXH3-64 len=17, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	0052929bb732a3242d00af950eecb893e3
expected	f3ec5067f4306db3

Vector 18 — XXH3-64 len=129, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f3
expected	21fffdbca099c844

Vector 19 — XXH3-64 len=241, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8 e5
expected	dda9b0a161d4829a

Vector 20 — XXH3-64 len=2048, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	8
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 … (2048 bytes; the full value is in the source)
expected	66f81670669ababc

Vector 21 — XXH3-128 len=0, seed 0

Field	Value
outputSize	16
input	(empty)
expected	99aa06d3014798d86001c324468d497f

Vector 22 — XXH3-128 len=1, seed 0

Field	Value
outputSize	16
input	00
expected	a6cd5e9392000f6ac44bdff4074eecdb

Vector 23 — XXH3-128 len=16, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893
expected	c68c368ecf8a9c05562980258a998629

Vector 24 — XXH3-128 len=17, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893e3
expected	955fa78643ed3669abbc12d11973d7db

Vector 25 — XXH3-128 len=128, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096
expected	39992220e045260aebb15e34a7fb5ab1

Vector 26 — XXH3-128 len=240, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8
expected	aa4202daa2769dc85c9aae94c8ebe5a0

Vector 27 — XXH3-128 len=241, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8 e5
expected	99a80ecf0ecfc647c5a639ecd2030e5e

Vector 28 — XXH3-128 len=1024, seed 0

Field	Value
outputSize	16
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 … (1024 bytes; the full value is in the source)
expected	0d30d24071c64c57dd85c9b5c1109c5c

Vector 29 — XXH3-128 len=1, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	16
input	00
expected	20e49abcc53b3842032be332dd766ef8

Vector 30 — XXH3-128 len=241, seed 0x9E3779B185EBCA8D

Field	Value
seed	9E3779B185EBCA8D
outputSize	16
input	0052929bb732a3242d00af950eecb893 e3dfef93aad6cd2a538b5c3f545a6fd5 59c0fffc8f85b9331dab74f7b6059327 b07084b3677c9f76480072ed7b9817e8 dd485e0c0ccbd0653fadb28f11b06ce8 8db0f186086159566c8e4e781363bdab 9d327309ea712fd97a9d55f0ca8ad0e9 5e1a36b36b0fca51ef8ba2c462ed0096 f33449eb0fd13b92a1a963dbaaed3dcf f10942cdf9b321a2ebf2c8f4e42f48d1 4b10f4c2efecf84ab53874c3a4a6620e bffd633741e386981aeb4cba56036687 ed004559c18544b6c368f941a9eaf987 e09f12d0d51454485d444051e338069a 4c3c0def6489f8a361eee3c51c9368c8 e5
expected	ec64afae6a137582dda9b0a161d4829a

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