coocood/freecache

Health v2 · maintenance only

Adoption not part of the score

5403 stars · 411 forks observed · 2026-08-28

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

FreeCache is an in-memory key-value cache library for Go that stores data in preallocated ring buffers to achieve zero garbage collection overhead. It supports hundreds of millions of entries with expiration, near-LRU eviction, and high-concurrency thread-safe access.

Use cases

• cache millions of objects in Go without GC pauses
• replace built-in Go map caching to reduce GC pressure
• in-process cache with TTL expiration
• high-concurrency thread-safe local cache
• limit memory usage of a Go application cache
• run a lightweight Redis-like cache server

When to choose

• your Go service caches many long-lived objects and suffers GC latency
• you need strict memory bounds and expiration in a local cache
• you want a pure Go, dependency-free caching library

When to avoid

• you need a distributed or shared cache across processes (use Redis)
• you need rich data structures beyond byte key-value pairs
• you cache only a small number of entries where a plain map suffices

Facets

library · maturity stable

caching databases performance developer-tools go cross-platform in-memory-cache zero-gc-overhead lru thread-safe key-value-store

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markdown · JSON · MCP: product_card(name="coocood/freecache")