isaacs/node-lru-cache

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

5910 stars · 375 forks observed · 2026-08-28

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

A high-performance JavaScript LRU (least-recently-used) cache library for Node.js and browsers, with optional TTL support, size tracking, and stale-while-revalidate fetching. It is a hybrid ESM/CJS module with zero dependencies.

Use cases

• cache expensive function results in memory with a bounded size
• evict least recently used items when a cache hits its max size
• add per-item TTL expiration to an in-memory cache
• implement stale-while-revalidate fetching in JavaScript
• limit memory usage of cached objects with size calculation
• speed up repeated lookups in a Node.js application

When to choose

• you need a fast, well-tested in-memory LRU cache in JavaScript
• you want optional TTL, size limits, and eviction callbacks in one cache
• you need a dependency-free cache that works in both Node.js and browsers

When to avoid

• you need strong TTL guarantees with preemptive expiration pruning
• you need a distributed or persistent cache across processes or servers
• you primarily need TTL caching rather than LRU eviction

Facets

library · maturity stable

caching developer-tools performance web-development browser lru in-memory-cache ttl eviction-policy zero-dependency nodejs javascript

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