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react-compiler

Determine manual React memoization needs using babel-plugin-react-compiler output.

11|2|Updated Feb 5, 2026
Search Tags:#react#hooks#memoization#react-compiler#render-optimization#babel-plugin#performance-debugging
One-click install
npx skills add https://github.com/recca0120/code-quest --skill react-compiler-recca0120
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: react-compiler
Source: https://github.com/recca0120/code-quest/tree/main/.claude/skills/react-compiler
Command: npx skills add https://github.com/recca0120/code-quest --skill react-compiler-recca0120

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Reduces wasted performance effort by telling you which React patterns React Compiler will auto-memoize, and which architectural boundaries still require manual optimization.

Core Features & Use Cases

  • Auto-memo truth over guesswork: Explains that the skill’s conclusions follow the real babel-plugin-react-compiler output, so you don’t overuse useMemo/useCallback.
  • Memo-able pattern coverage: Covers common cases like inline JSX/callback/object literals, spread returns, and filter/map/reduce/sort in hooks.
  • Explicit non-coverage boundaries: Identifies cases you must handle yourself, including component boundary memoization, “don’t include prop in identity” intent, and high-frequency setState commit rate issues.
  • Verification workflow: Provides a probe approach to compile a snippet and inspect output patterns (e.g., cache slot checks like if ($[0] !== dep)).

Quick Start

Ask the skill to tell you whether a specific React pattern should be manually optimized, and to justify the answer by mapping it to the expected babel-plugin-react-compiler memo behavior.

Frequently Asked Questions about react-compiler

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Do I still need useMemo and useCallback with React Compiler?▼

React Compiler auto-memoizes inline JSX, callbacks, and object literals, but you still need manual useMemo and useCallback for specific boundaries like component memoization and high-frequency setState commit rate issues.

How does React Compiler handle memoization for hook returns and provider values?▼

React Compiler handles memoization for hook returns and provider values by automatically applying cache checks during compilation, eliminating the need for manual useMemo wrappers for filter, map, reduce, and sort operations in hooks.

What React patterns cannot be auto-memoized by React Compiler?▼

React Compiler cannot auto-memoize component boundary memoization, patterns where you intentionally exclude a prop from identity checks, and high-frequency setState commit rate issues that require manual architectural optimization.

How do I verify if React Compiler is auto-memoizing a specific component pattern?▼

You can verify React Compiler memoization by probing the babel-plugin-react-compiler output and inspecting compiled cache slot checks like if ($[0] !== dep) to confirm whether auto-memoization is applied to your pattern.

Can I use React Compiler for performance debugging with the React Profiler?▼

Yes, React Compiler supports performance debugging by interpreting React Profiler output alongside the actual babel-plugin-react-compiler compilation results to determine whether wasted renders require manual optimization or are already auto-memoized.

When should I manually optimize React component render logic instead of relying on React Compiler?▼

You should manually optimize React render logic when dealing with component boundary memoization, intentional prop identity exclusions, or high-frequency setState commit rates, as React Compiler cannot automate these specific architectural boundaries.

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