An AI agent that profiles your application runtime behavior and identifies performance bottlenecks.

**TL;DR:** Profile your Node.js application, identify bottlenecks, detect memory leaks, and measure event loop lag with flamegraph output.

The 10-Second Pitch

**What it is:** A runtime profiler that attaches to your Node.js process and generates actionable performance reports.
**Who it's for:** Backend engineers, SREs, performance-obsessed architects.
**Why it matters:** Profiling in production is hard. This gives you production-grade insights without the overhead.
**Stack:** Node.js (built-in inspector protocol), outputs JSON + SVG flamegraphs.

Setup Directions

Prerequisites

Node.js >= 18
A running Node.js service to profile

Step 1 - Install

npm install @mrtech/performance-profiler --save-dev

Step 2 - Profile

npx perf-profiler attach --pid=$(pgrep -f "node.*server.js") --duration=60s

Step 3 - Read Report

npx perf-profiler report --input=./reports/profile-123456.json --format=html

Pros / Cons

Dimension	Rating	Notes
CPU Profiling	5/5	Native inspector, near-zero overhead

Memory Leak Detection	4/5	Heap snapshots with delta analysis

Verdict

Performance Profiler is what you reach for when your p99 latency is degraded and your existing APM isn't giving you a clear root cause. The event loop lag measurement is the killer feature.

*Skill: performance-profiler | Ecosystem: claude-code | Runtime: node | Auth: api-key*

#performance #profiling #node.js #observability #openclaw #claude-code

Event Loop Lag	5/5	Unique feature; directly measures JS main thread health

Performance Profiler: Find the Bottleneck Before Your Users Do