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Perfonext Profiler MCP

MCP server for analyzing V8/Chrome CPU profiles with line-level tick attribution.

Connector by souvikdu · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)
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Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/souvikdu-perfonext-profiler-mcp

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About

MCP server for analyzing V8/Chrome CPU profiles with line-level tick attribution.

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Permissions

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

Tools
9 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
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Runs as
Node.js package

Tools by what they do 9

Read from the source code; the running server may list different tools.

Read 9 · Look things up without changing anything.

  • compare_profiles
  • explain_function
  • get_hotspots
  • get_package_costs
  • get_profile_summary
  • how_to_collect
  • load_profile
  • read_source_context
  • suggest_optimizations

Files it touches

  • Any path the agent passes to its tools

Tools (9)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • compare_profilesCompare Profiles

    Compare two loaded CPU profiles side-by-side. Shows functions that got slower/faster and new/removed hotspots.

  • explain_functionExplain Function

    Returns detailed timing info for a specific function: self-time, total-time, callers, and callees. Use this to understand why a function is slow.

  • get_hotspotsGet Hotspots

    Returns the top N functions by self-time (CPU time spent directly in the function, not its callees). Use this to find performance bottlenecks.

  • get_package_costsGet Package Costs

    Aggregate CPU self-time by npm package. Identifies which third-party dependencies are consuming the most CPU, by parsing node_modules paths from the profile. Useful for deciding which packages to replace, lazy-load, or avoid. Scoped packages (e.g. @babel/core) are handled correctly.

  • get_profile_summaryGet Profile Summary

    Returns an overview of a loaded profile: duration, sample count, top-level call tree (filtered to functions >0.1% of total time), and idle time percentage. For large profiles, the call tree is limited to depth 2 and top 20 children per node to keep output manageable. Also lists all loaded profiles if no ID is given.

  • how_to_collectHow To Collect a CPU Profile

    Returns a ready-to-run command and step-by-step recipe for capturing a V8 CPU profile, then loading it with load_profile. Use this when you do not yet have a .cpuprofile file. Choose the scenario that matches how the code runs.

  • load_profileLoad CPU Profile

    Parse and load a V8/Chrome CPU profile from disk. Supports both .cpuprofile files and Chrome DevTools Trace JSON exports. Returns a profile ID for use with other tools.

  • read_source_contextRead Source Context

    Read the actual source code for a hot function and annotate each line with sampled tick counts from positionTicks. The returned window is sized to cover the function's actual hot lines, not just the area around its declaration; if any ticks still fall outside it, a `warning` field reports how many and suggests a larger contextLines. Only reads files within the project root.

  • suggest_optimizationsSuggest Optimizations

    Analyzes the profile and returns structured optimization suggestions for the hottest functions. Detects high fan-in, recursion, dominant callers, V8-specific patterns, always reports CPU self-time cost for expensive functions, and deduplicates functions split across multiple call sites.

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Last commit
Oct 10, 2026 (19 days ago)
Last release
Sep 11, 2026 (1 month ago)

From GitHub (fetched Oct 24, 2026).

Details

Registry name
io.github.souvikdu/perfonext-profiler-mcp
Version
0.7.3
Auth
No auth
Packages
npm @perfonext/profiler-mcp
License
MIT
Repository
github.com/souvikdu/perfonext-profiler-mcp
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql

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Perfonext Profiler MCP. Agent Mart. https://agentmart.dev/connectors/souvikdu-perfonext-profiler-mcp (last updated 2026-10-24)