performance-profiler

name	performance-profiler
description	Systematic performance profiling for Node.js, Python, and Go applications. Identifies CPU, memory, and I/O bottlenecks, generates flamegraphs, analyzes bundle sizes, optimizes database queries, runs load tests with k6 and Artillery. Always measures before and after. Use when investigating a slow endpoint, planning a performance budget, or hunting a memory leak in production.
compatibility	opencode

Performance Profiler

Tier: POWERFUL
Category: Engineering
Domain: Performance Engineering

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Overview

Systematic performance profiling for Node.js, Python, and Go applications. Identifies CPU, memory, and I/O bottlenecks; generates flamegraphs; analyzes bundle sizes; optimizes database queries; detects memory leaks; and runs load tests with k6 and Artillery. Always measures before and after.

Core Capabilities

• CPU profiling — flamegraphs for Node.js, py-spy for Python, pprof for Go
• Memory profiling — heap snapshots, leak detection, GC pressure
• Bundle analysis — webpack-bundle-analyzer, Next.js bundle analyzer
• Database optimization — EXPLAIN ANALYZE, slow query log, N+1 detection
• Load testing — k6 scripts, Artillery scenarios, ramp-up patterns
• Before/after measurement — establish baseline, profile, optimize, verify

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When to Use

• App is slow and you don't know where the bottleneck is
• P99 latency exceeds SLA before a release
• Memory usage grows over time (suspected leak)