hotpath-rs

Why we included this project

Rust services that are slow usually have a few functions doing most of the damage, and hotpath-rs is built to find them. It instruments functions, channels, futures, streams, SQL queries, HTTP calls, and byte-level I/O, then tells you which ones are slow because they wait on I/O and which are genuinely CPU-bound or allocation-heavy. You can produce one-off timing, memory, and CPU reports, or open the live TUI dashboard to watch a running process. The MCP server is the interesting part for AI-assisted work: an agent like Claude Code can ask in plain language which functions dominate execution time or where memory is being allocated, and get answers straight from live profiling data. For teams doing performance work in Rust, that makes profiling output something both humans and agents can actually act on.