MemoWise
A high-performance Ruby gem for memoizing instance, class, and module methods with thread safety and advanced features.
What is MemoWise?
MemoWise is a Ruby gem that provides advanced memoization for instance, class, and module methods. It caches method return values based on arguments, eliminating redundant expensive computations and significantly speeding up repeated calls. It solves the problem of inefficient memoization in Ruby by offering high performance, thread safety, and features like resetting and presetting values.
Ruby developers building performance-sensitive applications, especially those using memoization to cache expensive calculations, API calls, or database queries. It's ideal for projects where thread safety, inheritance, or frozen object support are concerns.
Developers choose MemoWise for its benchmark-proven speed, comprehensive feature set, and robust handling of edge cases like frozen objects and concurrency. Unlike simpler memoization approaches, it offers reset/preset functionality, preserves method privacy, and works seamlessly across instance, class, and module methods.
Overview
The wise choice for Ruby memoization
Use Cases
Best For
- Speeding up expensive calculations in Ruby applications
- Memoizing methods in Rails view helpers or other modules
- Caching API or database query results in thread-safe environments
- Optimizing performance in frozen object graphs
- Implementing memoization with inheritance in class hierarchies
- Replacing slower or less feature-rich memoization gems like dry-core or memery
Not Ideal For
- Applications where methods frequently take block arguments, as MemoWise explicitly cannot memoize them.
- Lightweight scripts or prototypes where the overhead of a full-featured memoization gem is unnecessary.
- Memory-constrained environments where caching numerous unique results could lead to excessive memory consumption.
Pros & Cons
Pros
Benchmarks show MemoWise outperforms competitors like memery and dry-core, with reads up to 20x faster in some cases, as detailed in the performance tables.
Supports resetting and presetting memoized values, frozen object compatibility, inheritance, and thread safety, all highlighted in the README as key strengths.
Provides clear documentation on concurrent access, ensuring deterministic behavior after memoization and safe handling before, as explained in the thread safety section.
Maintains method privacy for private methods when memoized, demonstrated in the usage example with private_slow_method.
Cons
Cannot memoize methods with implicit or explicit block arguments, limiting its use for common Ruby patterns that rely on blocks.
Memoization can persist across tests in shared instances, requiring manual resets as warned in the README, which adds maintenance and potential for bugs.
Relies on prepend for method interception, which might complicate debugging or conflict with other metaprogramming in complex codebases.
Frequently Asked Questions
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