This was an experiment of mine to re-implement some of the functionality of the original project in Rust. Outside of the change in languages the main difference here is that the application is implementing a state machine following a pattern from this excellent blog post. Note that this is not a complete implementation, merely enough of a prototype to run some crude benchmarks.
As one would expect Rust exhibits much better resource utilization than Ruby.
Check out some non-rigorous snapshots of performance on Linux and Windows.
The testing methodology was to invoke chefctl -icH and observe what was
going on with memory.
valgrind --tool=massif /usr/local/bin/chefctl -icH
cargo build --release && valgrind --tool=massif ./target/release/chefctl
In both screenshots Ruby is on the left and Rust is on the right. Telemetry was
captured with procexp.exe:
~Fin