Claude skill for Apple Instruments performance traces (iOS/Mac)
I was running into scroll performance issues with a mac app I was building a few months back and I got frustrated with the manual instrument → trace → diagnose → fix loop, so I built a way for claude to do it automatically. Instruments Analyzer exports .trace files captured programmatically or via Instruments (file → save) into DuckDB with Parquet backing, giving your agents full SQL access to CPU profiling, animation hitches, SwiftUI view updates, Core Animation frame lifetimes, RunLoop activity, signposts, and 30+ other tables. Key features: 1. Natural Language Queries. Since it’s just a…
What it does
In the maker’s words, at launch
I was running into scroll performance issues with a mac app I was building a few months back and I got frustrated with the manual instrument → trace → diagnose → fix loop, so I built a way for claude to do it automatically. Instruments Analyzer exports .trace files captured programmatically or via Instruments (file → save) into DuckDB with Parquet backing, giving your agents full SQL access to CPU profiling, animation hitches, SwiftUI view updates, Core Animation frame lifetimes, RunLoop activity, signposts, and 30+ other tables. Key features: 1. Natural Language Queries. Since it’s just a skill, you can ask “why did scroll lag in this trace” rather than dig through WWDC videos to understand which instruments to use and how to use them. 2. Derived views for analysis: Frame-level analysis, cascade analysis, and per-frame attribution are available via prepared views (prepare_analysis.py), making it easy to query performance metrics without manual preprocessing. 3. Scroll & animation jank workflow: Optional workflow for diagnosing scroll lag or animation stutter, only loads when relevant. Install as a Claude Code skill or with whatever agent you’re building with. https://github.com/jlreyes/instruments-analyzer
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