perfetto-mcp MCP — Casos de uso, Instalar & Demo en vivo

Por qué usarlo

Características clave

Categories: Exploration, Performance (ANR, CPU, jank), Concurrency (locks, Binder), Memory
Custom SQL tool for when you know what you want
Targets Android / Linux Perfetto traces
Install via uvx perfetto-mcp (Python 3.13+)
Apache 2.0

Demo en vivo

Cómo se ve en la práctica

perfetto.replay ▶ listo

0/0

Instalar

Elige tu cliente

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Abre Claude Desktop → Settings → Developer → Edit Config. Reinicia después de guardar.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Cursor usa el mismo esquema mcpServers que Claude Desktop. La configuración del proyecto prevalece sobre la global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Haz clic en el icono MCP Servers de la barra lateral de Cline y luego en "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "perfetto": {
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ],
      "_inferred": true
    }
  }
}

Mismo formato que Claude Desktop. Reinicia Windsurf para aplicar.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "perfetto",
      "command": "uvx",
      "args": [
        "perfetto-mcp"
      ]
    }
  ]
}

Continue usa un array de objetos de servidor en lugar de un mapa.

~/.config/zed/settings.json

{
  "context_servers": {
    "perfetto": {
      "command": {
        "path": "uvx",
        "args": [
          "perfetto-mcp"
        ]
      }
    }
  }
}

Añádelo a context_servers. Zed recarga en caliente al guardar.

claude mcp add perfetto -- uvx perfetto-mcp

Un solo comando. Verifica con claude mcp list. Quita con claude mcp remove.

Casos de uso

Usos del mundo real: perfetto-mcp

Find the cause of UI jank in a recorded trace

👤 Android devs, perf engineers ⏱ ~25 min advanced

Cuándo usarlo: User report: 'the app stutters when I scroll'. You captured a Perfetto trace. Now what?

Requisitos previos

Perfetto .pftrace file — perfetto / systrace / Android Studio Profiler

Flujo

Point MCP at the trace

Open /tmp/jank.pftrace for process com.example.app. Find jank frames — anything over 16.67ms on the main thread.✓ Copiado

→ List of janky frames with slice context
Attribute the cause

For the top 3 janky frames, what slice dominated? What was the main thread doing when the frame missed?✓ Copiado

→ Cause per frame
Propose fix

Based on these bottlenecks, suggest concrete changes (move off main, cache, etc.).✓ Copiado

→ Fix plan

Resultado: Jank root cause identified without staring at the timeline UI.

Errores comunes

Sample interval too coarse — missing short hot methods — Re-record with higher sampling frequency when needed

Diagnose an ANR from a trace

👤 Android devs dealing with ANRs ⏱ ~20 min advanced

Cuándo usarlo: Production ANR and you can capture a trace.

Flujo

Detect

Run ANR analysis on /traces/anr.pftrace for process com.example.app. What blocked the main thread?✓ Copiado

→ Blocking chain
Identify lock

Was this a lock contention? Identify holder vs waiter threads and the resource.✓ Copiado

→ Contention diagram

Resultado: ANR root cause + whom to wake up on-call.

Hunt a suspected memory leak

👤 Android / native devs ⏱ ~30 min advanced

Cuándo usarlo: Heap keeps growing over time on a given screen.

Flujo

Analyze heap

For trace X, process Y: run memory analysis. What allocations dominate and does the retained set grow monotonically?✓ Copiado

→ Allocation summary + trend
Correlate

What activities / fragments / slices correlate with growth spikes?✓ Copiado

→ Correlation report

Resultado: Leak suspects identified.

Errores comunes

GC hasn't run yet — growth isn't necessarily leak — Trigger GC between recordings; compare

Combinaciones

Combínalo con otros MCPs para multiplicar por 10

perfetto + filesystem

Save per-release trace analysis for regression tracking

Analyze jank trace for vX.Y.Z and save summary to /perf-reports/vX.Y.Z.md.✓ Copiado

Herramientas

Lo que expone este MCP

Herramienta	Entradas	Cuándo llamar	Coste
explore_slices	trace_path, process, time_range?	Get your bearings in a new trace	free
detect_anr	trace_path, process	ANR investigation	free
cpu_profile	trace_path, process, threshold_ms?	CPU hotspot hunt	free
thread_contention	trace_path, process	Concurrency issues	free
memory_analysis	trace_path, process	Memory investigations	free
custom_sql	trace_path, sql: str	You know the exact Perfetto SQL you want	free

Coste y límites

Lo que cuesta ejecutarlo

Cuota de API: None (local)
Tokens por llamada: Trace summaries 2k-10k tokens typically
Monetario: Free (Apache 2.0)
Consejo: Always pass a time range if you know roughly when the issue occurred — slashes query time and tokens.

Seguridad

Permisos, secretos, alcance

Almacenamiento de credenciales: None; local trace files

Salida de datos: Summaries go to your LLM provider — traces can include sensitive process/app names

Traces may contain internal process names and package paths; treat as confidential if from proprietary apps.
Requires Python 3.13+ — check before installing.

Resolución de problemas

Errores comunes y soluciones

Trace file too large to parse

Perfetto can handle GB-scale traces but first call can be slow. Give it time; subsequent queries are faster.

Process name not found

Verify with custom_sql SELECT name FROM process. Process names can differ from app package IDs.

Python version error

Needs 3.13+. Use uv python install 3.13 then uvx perfetto-mcp.

Verificar: python --version

Alternativas

perfetto-mcp vs otros

Alternativa	Cuándo usarla	Contrapartida
Perfetto UI (ui.perfetto.dev)	You want visual timeline analysis	Manual; no LLM explanations
Android Studio Profiler	You live inside Android Studio	IDE-bound; less scriptable

Más

Recursos

📖 Lee el README oficial en GitHub

🐙 Ver issues abiertas

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