[](https://travis-ci.org/dolegi/rapid-crc) # Rapid CRC Aims to be the fastest crc32 and crc32c implemenations on npm
Aims to be the fastest crc32 and crc32c implemenations on npm
npm install rapid-crc
const rapidCrc = require('rapid-crc')
const crc1 = rapidCrc.crc32(Buffer.from('123'))
// -> 2297840959
const crc2 = rapidCrc.crc32c(Buffer.from('123'))
// -> 2413851447
Uses slice-by-32 (based on slice-by-8 by intel and slice-by-16 by stehpan brumme). Increasing the size of the lookup to 32 gave the best performance on my machine (2015 macbook pro, i5, 8GB), by 64 > was slower. I think this is due to the amount of data being loaded per cache-line.
Uses SSE4.2 if supported or falls back to slice-by-32.
$ node --version
v10.16.1
$ node performance/benchmark-crc32.js
rapid-crc x 1,593,095 ops/sec ±0.86% (89 runs sampled)
turbo x 608,301 ops/sec ±2.11% (86 runs sampled)
sheetjs x 283,236 ops/sec ±0.92% (90 runs sampled)
Fastest is rapid-crc
$ node --version
v10.16.1
$ node performance/benchmark-crc32c.js
rapid-crc x 2,677,754 ops/sec ±0.53% (89 runs sampled)
turbo x 617,280 ops/sec ±0.45% (86 runs sampled)
sse4_crc32 x 2,353,431 ops/sec ±0.57% (90 runs sampled)
Fastest is rapid-crc
FAQs
[](https://travis-ci.org/dolegi/rapid-crc) # Rapid CRC The fastest crc32 and crc32c implemenations on npm
The npm package rapid-crc receives a total of 19 weekly downloads. As such, rapid-crc popularity was classified as not popular.
We found that rapid-crc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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