hash-prospector
meow_hash
| hash-prospector | meow_hash | |
|---|---|---|
| 13 | 13 | |
| 614 | 1,684 | |
| - | - | |
| 2.8 | 0.0 | |
| 2 months ago | almost 2 years ago | |
| C | C++ | |
| The Unlicense | zlib License |
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hash-prospector
- Automated integer hash function discovery
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A very good, one might say, a 'perfect' hashtable algorithm! Thoughts?
But for good general purpose hash functions, you can also take a look at u/skeeto's prospector project.
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FRand: A Fast and Simple PRNG Library in Rust
Special thanks to hash-prospector for inspiration and useful information.
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"Tests for randomness" by jonmaiga (creator of mx3)
A project to keep an eye on in the future. The -search command is very much like my own hash search, plugging different constants into xmxmx.
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Do you think there needs to be protection from player's reloading saves when something negative happens?
Maybe look at https://github.com/skeeto/hash-prospector https://www.reedbeta.com/blog/hash-functions-for-gpu-rendering/
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Fixing the Linear Congruential Generator
New best known functions
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A Single Header Vectorized Hash Function (~9.6 GB/s)
https://github.com/skeeto/hash-prospector (recently outdone)
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Weird problem: print every 32 bit number once, in random order, without wasting memory
Where each 0xXXXXXXXX is a random, odd 32-bit integer. Not all choices are equal, and you can find some excellent xmx parameters here: https://github.com/skeeto/hash-prospector/issues/19
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A Simple Hash for Perlin Noise
For my stack based texture generator I used (utilizing https://github.com/skeeto/hash-prospector )
let intHash = x => { -
Simplest way to create strongly typed using/typedefs for ints?
This is one of the best known hashes for 32 bit integers. See https://github.com/skeeto/hash-prospector and https://nullprogram.com/blog/2018/07/31/
meow_hash
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Use fast data algorithms (2021)
I'm late on the reply but I was using xxhash for something similar, but found that Meow hash was faster for me. Feel free to benchmark, since I'm sure it could vary depending on CPU architecture.
- Meow Hash (2018)
- Meow Hash
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Cryptanalysis of Meow Hash
for everyone who doesn't think highly of Casey Muratori (or at least the way he conducts himself online), the author of Meow Hash, took the criticism quite graciously:
https://twitter.com/cmuratori/status/1417546500083568641
https://github.com/cmuratori/meow_hash/issues/80
- Full 128-bit collision between two files in Meow Hash
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Reading a file in parallel
Is a standardized hashing algorithm required? SHA256 takes several CPU cycle per byte, but there are several hashing algorithm utilizing AES-NI that gives them 15-16 bytes per cycles, which translates to tens of gigabytes per second on modern CPU. At least one of them has been ported to .NET Core, and from what I see properly calls AES primitives.
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76% Faster CPython
MeowHash is the fastest non-cryptographic hash available online, and if it were used in CPython, which performs a hash for every fundamental operation in the language, then Python would be much faster.
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New Bare Hash Map: 2X-3X Speedup over SOTA
Meow hash claims 3-4x faster hashing over this, still passes smhasher, and is a few years old. https://mollyrocket.com/meowhash
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A Hashmap for the C Programming Language
Have you seen the meow hash implementation? Would that be suitable for this ?
What are some alternatives?
pbrt-v4 - Source code to pbrt, the ray tracer described in the forthcoming 4th edition of the "Physically Based Rendering: From Theory to Implementation" book.
xxHash - Extremely fast non-cryptographic hash algorithm
frand - Blazingly Fast Pseudo Random Number Generator written in Rust
BLAKE3 - the official Rust and C implementations of the BLAKE3 cryptographic hash function
c-hashmap - A fast hash map/hash table (whatever you want to call it) for the C programming language.
hashbrown - Rust port of Google's SwissTable hash map
tests-for-randomness - A collection of tests for randomness.
wyhash - The FASTEST QUALITY hash function, random number generators (PRNG) and hash map.
meow_hash.NET - Port of https://github.com/cmuratori/meow_hash to .NET Core
pHash - pHash - the open source perceptual hash library
smhasher - Automatically exported from code.google.com/p/smhasher
aHash - aHash is a non-cryptographic hashing algorithm that uses the AES hardware instruction