# klauspost/reedsolomon

Reed-Solomon Erasure Coding in Go

Repository: https://github.com/klauspost/reedsolomon
Canonical: https://ross.abutalabs.com/products/reedsolomon
Language: Assembly
License: MIT
License Family: permissive
Last push: 2026-08-19T15:50:05+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 86, longevity 100
- inputs: {"age_days": 4093, "days_push": 14, "days_rel": 14, "gap_med": 47, "n_releases_24m": 10}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2091, forks 274 (observed 2026-08-28T04:06:12.492961+00:00)

## What it is
A pure Go library implementing Reed-Solomon erasure coding with high performance (over 1GB/s per CPU core), including a Leopard implementation for high shard counts. It is a port of Backblaze's JavaReedSolomon library with additional optimizations.

## Use cases
- add erasure coding redundancy to distributed storage
- recover lost data shards in Go
- implement parity encoding for files
- build fault-tolerant object storage
- encode data with more than 256 shards
- split data into data and parity shards

## When to choose
- you need fast, pure-Go Reed-Solomon encoding/decoding without cgo
- you are building storage systems that must tolerate shard loss
- you need very high shard counts via Leopard coding

## When to avoid
- you need forward error correction for network streams rather than block data
- you want a non-Go language binding
- you need simple replication instead of erasure coding

## Facets
- artifact type: library
- maturity: active
- function: cryptography, serialization, concurrency
- domain: databases, microservices, developer-tools
- platform: go, cross-platform
- tags: erasure-coding, reed-solomon, error-correction, data-redundancy, simd-optimization, algorithms

## Member repositories
- klauspost/reedsolomon (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:12.492961+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:55:33.357529+00:00, confidence not recorded.
  - readme: https://github.com/klauspost/reedsolomon (fetched 2026-08-28T04:06:12.492961+00:00, sha 1ef6a6ba98fa)
- Data as of 2026-08-30T08:39:29.467469+00:00.