reactjs/reselect
Reselect
Reselect is a memoized selector framework and state selector library designed to optimize performance in Redux applications. It provides a system for computing derived data from a state store and caching the results to prevent unnecessary user interface re-renders.
The library functions as a state transformation pipeline, allowing multiple selectors to be composed into chains. This enables the creation of complex data transformation pipelines where the output of one memoized selector serves as the input for another.
The framework focuses on input-based memoization and referential equality checking to ensure expensive calculations only run when dependencies change. It supports derived state projection and dependency tracking to transform raw state trees into specific data shapes.
The project is implemented in TypeScript.
Features
- Memoized Derivations - Implements a caching layer for state lookups to ensure components only update when dependencies change.
- Method Result Caches - Stores the result of a calculation based on input arguments to avoid redundant processing.
- State Transformation Pipelines - Composes multiple selectors into a chain to process complex state trees into specific application data.
- Composable Selector Pipelines - Provides a system for chaining multiple memoized selectors to build complex data transformation pipelines.
- Derived State Management - Computes derived data from a Redux store while preventing unnecessary user interface re-renders.
- Memoized Computations - Caches result values and returns them immediately if the provided input arguments remain identical.
- Referential Equality Checking - Uses strict identity comparison to determine if input data has changed before triggering recalculations.
- Derived State - Transforms raw state trees into specific data shapes without mutating the original source of truth.
- State Selectors - Computes derived data from a Redux store and caches the results to prevent unnecessary re-renders.
- Component Update Optimizations - Reduces the number of computations and component updates in Redux applications through result caching.
- Dependency Tracking - Monitors input selectors to ensure results are only recomputed when specific dependencies update.
- Custom Memoization Rules - Controls how arguments and results are cached by replacing default equality checks with custom functions.
- Value-Based Equality Checking - Allows replacing default identity checks with custom functions to determine if cached values are stale.
- Frontend Performance Optimization - Reduces expensive calculations in web applications by caching results based on input stability.
- Data Transformation Pipelines - Creates complex data pipelines that transform raw state into a format ready for display.
- 数据管理 - Selector library for optimizing Redux state access.
- React - A JavaScript library for building user interfaces - Listed in the “React - A JavaScript library for building user interfaces” section of the Awesome Redux awesome list.
- Utilities - Listed in the “Utilities” section of the Awesome Redux awesome list.
