Individual skill

app-performance-monitoring

Application performance monitoring — transactions, profiling, and finding slow code — works with any APM platform.

skills/app-performance-monitoring/SKILL.md

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## Overview

APM answers "why is this slow?" with data: which transactions are slow,
which spans dominate, which database queries drag, and how performance
trends across releases. This skill covers instrumenting applications for
performance visibility and using that data to find and fix real bottlenecks —
independent of any specific APM vendor.

## When to use

- Finding why an endpoint or page load is slow
- Setting up transaction tracing and span instrumentation
- Identifying N+1 queries, slow serialization, or chatty service calls
- Tracking performance across releases (did v2.1 get slower?)
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