Node.js implementation of Google's FarmHash family of very fast hash functions.
FarmHash is the successor to CityHash. Functions in the FarmHash family are not suitable for cryptography. A fast, cryptographically-secure alternative is HighwayHash.
The 32-bit methods return a Number,
the 64-bit methods return a BigInt
and the 128-bit methods are not implemented.
This module uses FarmHash v1.1.0 (2015-03-01). It has been tested with Node.js 16, 18, 20 and 22 on Linux (glibc, musl), macOS (x64, arm64) and Windows (x86, x64).
Pre-compiled binaries are provided for
Intel CPUs with SSE4.2 intrinsics
and Apple ARM64 CPUs.
Use the npm install --build-from-source flag to gain performance benefits
on more modern CPUs such as those with AVX intrinsics.
npm install farmhashyarn add farmhashpnpm add farmhashconst farmhash = require('farmhash');const hash = farmhash.hash32('test');
console.log(typeof hash); // 'number'const hash = farmhash.hash64(new Buffer('test'));
console.log(typeof hash); // 'bigint'const hash = farmhash.hash64WithSeed('test', 123);
console.log(typeof hash); // 'bigint'const hash = farmhash.fingerprint32(new Buffer('test'));
console.log(typeof hash); // 'number'const hash = farmhash.fingerprint64('test');
console.log(typeof hash); // 'bigint'const hash = farmhash.fingerprint64signed('test');
console.log(typeof hash); // 'bigint'The hash methods are platform dependent. Different CPU architectures, for example 32-bit vs 64-bit, Intel vs ARM, SSE4.2 vs AVX might produce different results for a given input.
inputis theBufferorStringto hash.
Returns a Number containing the 32-bit unsigned integer hash value of input.
inputis theBufferorStringto hash.seedis an integer Number to use as a seed.
Returns a Number containing the 32-bit unsigned integer hash value of input.
inputis theBufferorStringto hash.
Returns a BigInt containing the 64-bit unsigned integer hash value of input.
inputis theBufferorStringto hash.seedis an integerNumberto use as a seed.
Returns a BigInt containing the 64-bit unsigned integer hash value of input.
inputis theBufferorStringto hash.seed1andseed2are both an integerNumberto use as seeds.
Returns a BigInt containing the 64-bit unsigned integer hash value of input.
The fingerprint methods are platform independent, producing the same results for a given input on any machine.
inputis theBufferorStringto fingerprint.
Returns a Number containing the 32-bit unsigned integer fingerprint value of input.
inputis theBufferorStringto fingerprint.
Returns a BigInt containing the 64-bit unsigned integer fingerprint value of input.
inputis theBufferorStringto fingerprint.
Returns a BigInt containing the 64-bit signed integer fingerprint value of input.
This matches the signed behaviour of Google BigQuery's FARM_FINGERPRINT function.
npm testCopyright 2014 Lovell Fuller and contributors.
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Copyright 2014, 2015, 2016, 2017 Google, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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