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Awesome Elixir0 Hot0 comments12 min read
Profiling Rust NIFs in Elixir
A practical guide to profiling Rust NIFs (Native Implemented Functions) called from Elixir, using the hotpath crate alongside Rustler and Benchee. The post walks through setting up a small Elixir/Rust project, configuring hotpath as an optional Cargo feature, wiring up the profiler lifecycle via Rustler's on_load hook and a custom NIF to flush results, and collecting per-function timing and allocation data into JSON. The resulting profile output reveals that first_thing is responsible for all allocations and most CPU time, demonstrating how to identify optimization targets across the language boundary.
Source: https://blog.smaller-infinity.com/posts/profiling-rust-nifs-in-elixir. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.
