golang/groupcache

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

13332 stars · 1392 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

groupcache is a Go distributed caching and cache-filling library intended as a replacement for a pool of memcached nodes. It embeds both client and server functionality, coordinating cache fills across peers so only one load populates the cache and deduplicates concurrent lookups.

Use cases

• replace memcached with an embedded distributed cache in Go services
• prevent thundering herd on cache misses when loading from a database
• cache immutable values across a replicated set of processes
• mirror super-hot keys to multiple processes to avoid hot spotting
• shard cache keys across peers via consistent hashing

When to choose

• your cached values are immutable (no expiration or eviction needed)
• you want a distributed cache without deploying separate cache servers
• you need coordinated, deduplicated cache fills across many processes
• you are building Go services with read-heavy, rarely-changing data

When to avoid

• you need TTLs, explicit evictions, CAS, or Increment/Decrement
• your cached values change over time and need versioning
• you are not using Go
• you need a standalone cache server shared by heterogeneous clients

Facets

library · maturity maintenance

caching rpc concurrency databases backend microservices performance go cross-platform distributed-cache cache-filling memcached-replacement consistent-hashing singleflight

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markdown · JSON · MCP: product_card(name="golang/groupcache")