sindresorhus/memoize

Health v2 · maintenance only

Adoption not part of the score

1163 stars · 55 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A TypeScript library for memoizing functions, caching results of calls with identical input to speed up consecutive invocations. It supports TTL-based expiration, custom caching strategies, and automatic memory release.

Use cases

• memoize expensive function calls in javascript
• cache function results by input arguments
• add ttl expiration to memoized functions
• speed up repeated function calls with same arguments
• memoize functions with custom cache keys
• avoid recomputing pure function results

When to choose

• you need lightweight function-level caching in Node.js or the browser
• you want TTL-based cache expiration with automatic memory cleanup
• you need customizable caching strategies like multi-argument keys or WeakMap caching
• you prefer a small, well-maintained ESM package

When to avoid

• you need to memoize promise-returning functions with promise-specific behaviors - use p-memoize instead
• you need a distributed or persistent cache rather than in-memory function memoization
• your functions have side effects and caching results would be incorrect

Facets

library · maturity active

caching concurrency developer-tools performance browser bun memoization typescript ttl-cache function-optimization npm javascript nodejs deno

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