mem
Memoize functions to speed up consecutive calls with identical input.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is mem?
Mem is a JavaScript library that memoizes functions by caching their results for given inputs, optimizing performance in scenarios where the same function is called repeatedly with the same arguments.
Key differentiator
“Mem stands out as a lightweight and effective library for memoizing functions in JavaScript, offering a simple yet powerful way to optimize performance without complex setup.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
Mem may not handle objects or arrays effectively as input arguments for memoization, leading to incorrect caching behavior.
Frequent updates can lead to excessive cache invalidation and recomputation, negating the benefits of memoization.
The tool has a relatively small user base and fewer contributions compared to more established memoization libraries like Lodash.
Fit analysis
Who is it for?
✓ Best for
Developers working on JavaScript projects who need to optimize function calls for better performance
Scenarios where a function is called repeatedly with the same arguments, leading to redundant computations
✕ Not a fit for
Projects that do not require optimization of function calls or memoization techniques
Situations where the overhead of caching results outweighs the benefits of memoization
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Integrations
Next step
Get Started with mem
Step-by-step setup guide with code examples and common gotchas.