Rust Performance

Use this skill for Rust optimization work that needs disciplined measurement, targeted changes, and explicit trade-offs, following the methodologies from The Rust Performance Book (https://nnethercote.github.io/perf-book/).

When to Use This Skill

• Runtime performance is too slow in --release
• Memory usage, allocation rate, or memcpy traffic is high
• Binary size needs to shrink
• Compile times are slow or regressing
• Profilers show confusing stacks, symbols, or hotspots
• HashMap, iterators, I/O, logging, or synchronization appear hot
• Inlining decisions need tuning (function call overhead is hot)
• Machine code inspection needed for bounds checks or missed vectorization
• You need a Rust-specific optimization workflow instead of generic advice

Core Workflow