allegro/bigcache

Health v2 · maintenance only

Adoption not part of the score

8155 stars · 610 forks observed · 2026-08-28

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

BigCache is a fast, concurrent, evicting in-memory cache library for Go designed to hold gigabytes of entries without GC overhead by storing data as byte slices on the heap. It supports sharding, TTL-based eviction, size limits, and removal callbacks.

Use cases

• cache gigabytes of data in a Go service without GC pauses
• add a fast in-process key-value cache to a Go API
• store millions of entries in memory with predictable performance
• cache serialized objects with TTL expiration in Go
• replace map-based caching that causes high GC pressure

When to choose

• you need a high-throughput in-memory cache inside a single Go process
• GC pauses from large maps are hurting your service's latency
• you can store entries as byte slices and handle serialization yourself

When to avoid

• you need a distributed or shared cache across multiple instances (use Redis instead)
• you need to cache complex Go objects without serialization overhead
• your dataset is small enough that a plain map with sync.RWMutex suffices

Facets

library · maturity stable

caching performance backend developer-tools go windows cross-platform in-memory-cache gc-friendly byte-slice-storage sharded-cache golang linux macos

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