JIjinyu2026·Mar 22, 2026Submission
New development in PRNG of wyhash: w1rand
2 points · Open discussionwangyi-fudan
wyhash
C2019–2026
wangyi-fudan / wyhash
wyhash
The FASTEST QUALITY hash function, random number generators (PRNG) and hash map.
11Distinct people
12Mentions
0Explicit recommenders
1.2KGitHub stars
What to know before exploring
What it is
The FASTEST QUALITY hash function, random number generators (PRNG) and hash map.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year12 dated mentions
Observed mentions: 2019-03-11 12:05:29 UTC to 2026-03-22 17:28:43 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 5 | 2 | 3 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 3 | 1 | 2 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
12 sourcesWyhash: The fastest quality hash function
1 points · Open discussionI feel like you’d want something a bit safer than “we don’t store the keys and just rely on the hash to be really good” [1], putting “please do not use this for serious tasks” in a comment embedded in the header file isn’t a clear enough warning.
It’s not clear to me that that probability of collision assumptions hold. It’s basically assuming that the hashing is perfect and distributes any inputs to the full 64-bit space with uniform probability. That’s the usual hash map / randomized algorithm hope, but does BigCrush or similar avalanche testing really prove that? (Presumably not, otherwise there wouldn’t be image attacks for things like md5).
[1] https://github.com/wangyi-fudan/wyhash/blob/d2a305811972f391...
In New Bare Hash Map: 2X-3X Speedup over SOTA#ifndef WYHASH_CONDOM
A what now?
https://github.com/wangyi-fudan/wyhash/blob/master/wyhash.h#...
In New Bare Hash Map: 2X-3X Speedup over SOTANew Bare Hash Map: 2X-3X Speedup over SOTA
74 points · Open discussionOne might be interested in https://github.com/wangyi-fudan/wyhash
In A Family of Better Random Number Generatorswyhash is very impressive for those interested. Not sure why it doesn't get a lot of attention.
https://github.com/wangyi-fudan/wyhash
In Show HN: Discohash – Fast HashA pseudorandom number generator that is potentially faster than Lehmer's RNG
2 points · Open discussioncycles/hash have been reduced by 1.8 on average. large key speed is much higher now. Unaligned read problem is fixed. Cheers!
https://github.com/wangyi-fudan/wyhash
1 points · Open discussionAwesome! Found a bug (undefined behavior) and made a PR.
https://github.com/wangyi-fudan/wyhash/pull/3
In New fastest portable hash: wyhashIf this is all there is to it:
https://github.com/wangyi-fudan/wyhash/blob/master/wyhash.h
That doesn’t seem like much.
In New fastest portable hash: wyhashHere's a link to wyhash itself: https://github.com/wangyi-fudan/wyhash
In New fastest portable hash: wyhash