React Render Profile MCP

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npx agentmarket install connector/vola-trebla-react-render-profile-mcp

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What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

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Tools (13)

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• analyze_compiler_efficacy

  Evaluates React Compiler or manual React.memo efficacy by tracking spurious renders. Calculates the Invalidation Index for each component to identify where unstable prop references trigger wasteful renders.

• audit_compiler_rules

  Audits a React component file to check if it violates compiler memoization safety guidelines (e.g., Date.now(), Math.random(), useRef mutations in render, 'use no memo' bails).

• correlate_chrome_trace

  Aligns React commits with Chrome Performance trace events (re-layout, paint, style calculations) using blink.user_timing ⚛ markers to calculate Core Web Vitals (INP/CLS) impact.

• diagnose_hydration_and_suspense

  Detects server-client hydration mismatches and sequential nested Suspense waterfalls by analyzing mount durations, unmount events, and timelines.

• evaluate_external_store_performance

  Analyzes useSyncExternalStore performance, identifying selector reference instability and concurrency bypasses where heavy store updates block the high-priority main thread.

• find_spurious_renders

  Finds React components that re-rendered without any meaningful prop, state, context, or hook changes. These are wasted renders caused by unstable references (inline objects/functions/arrays) passed from a parent. Returns component name, total render count, spurious count, and wasted milliseconds. Use to identify the highest-ROI targets for React.memo.

• get_hottest_components

  Returns the top N React components ranked by self CPU time (excluding children) across the entire profiling session. Includes total self ms, average per render, and percentage of total profile time. Use to find which components are the most expensive to render, regardless of cause.

• get_render_summary

  Returns a high-level overview of a React DevTools Profiler export: total commits, total render time, top 5 slowest components by self time, and total spurious (wasted) render count. Use this first to understand the scale of the performance problem before drilling into specifics.

• profile_rsc_stream

  Analyzes a React Server Components (RSC) Flight stream text log. Detects bloated chunks (>50KB), sequential Waterfall request bottlenecks, and security hazards like constructor traversing exploits (CVE-2025-55182 / React2Shell).

• remediate_component

  Automatically optimizes a React component's AST by hoisting static declarations, wrapping unstable callbacks/objects in useCallback/useMemo, and wrapping the component in React.memo if the ROI score is above 1.5. Mutates the file on disk.

• suggest_memoization

  Analyzes the profiling data and returns concrete memoization suggestions. Currently detects React.memo candidates: components with spurious renders above the wasted ms threshold. Each suggestion explains why the component re-renders unnecessarily and what to do about it.

• trace_render_cascade

  For a specific React commit (render cycle), shows what triggered it and lists every component that re-rendered as a result, sorted by actual duration descending. Reveals propagation — e.g. a context update cascading into 40 children. Call get_render_summary first to find total_commits, then use 0-based commit_index.

• trace_state_cascade_footprint

  Reconstructs the virtual parent/owner tree traversal to measure the depth and consumer count of a state update cascade for a specific commit index.

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Last commit

May 22, 2026 (5 months ago)

Last release

May 22, 2026 (5 months ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name

io.github.vola-trebla/react-render-profile-mcp

Version

1.0.2

Auth

No auth

Packages

npm react-render-profile-mcp

License

MIT

Repository

github.com/vola-trebla/react-render-profile-mcp

First seen

Oct 24, 2026

Last checked

Oct 24, 2026

Source

Official MCP Registrygithub-graphql