bebb4185

:city_sunrise: Discohash

5GB/s SMHasher

Discohash (also known as BEBB4185) is a super-fast non-cryptographic hash that passes SMHasher, and runs at 5GB/s in this naive, portable implementation.

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Quick Facts

• A super-fast 64-bit non-cryptographic hash.
• Tested at ~ 5GB/s @ 3Gz.
• Passes all SMHasher tests.
• Also known as: BEBB4185
• Implemented in C++, and also a port to JS

Using

Use the C code from this repository, or, for a JS implementation:

npm i --save bebb4185

Use in Node.JS:

import {disocash} from 'bebb4185'

Or using Snowpack as a webmodule:

import {discohash} from './web_modules/bebb4185.js';

JS Implementation

• The JS Implementation produces the same value hashes as the C++ implementation.
• The JS implementation is ~ 1000x slower than the C++ implementation.
• This is probably because of the use of BigInts to stand in for uint64_t
• It's possible to implement a 64-bit mult using 32-bit view which would remove the need for BigInt. I have no plan to do this.

SMHasher verification value

The value is: BEBB4185