iai VS gattii

The three popular options for benchmarking in Rust are: libtest bench, Criterion, and Iai.

Iai^1 uses CacheGrind^2 to count instructions

[1] - https://github.com/bheisler/iai

But, /u/bencherdev, please consider integrating iai measurements! By the same person behind criterion but designed for one-shot measurements that are stable in CI measurements.

Is lai no longer maintained? It hasn't had any commits in a year and a half.

Lately I've found that using unwrap_unchecked has nearly zero performance gain but all the UB to gain if you change the code one day. My source is iai which provides exact instruction counts and is entirely deterministic for any given execution (and almost-deterministic across different compilations of the same program).

Have you tried criterion.rs or iai ? The first is great at micro benchmarks and, if it is not enough, the second can catch even smaller performance difference.

In the mean time maybe https://github.com/bheisler/iai could be of help

Well, the most interesting one is probably Iai; an experimental benchmark framework that runs all of the benchmarks in Cachegrind for much higher precision and repeatability than is possible with Criterion.rs. It's still a work-in-progress, so I haven't published it on Crates.io yet. See the readme for a more detailed discussion of the pros/cons relative to Criterion.rs.

I've started working on a rewrite of my Gattii serial terminal UI (https://gitlab.com/susurrus/gattii) to rely on libhandy so it's usable on the Librem 5, which I'm planning to purchase when they to GA this year. I've been wanting to rewrite it for a while since there's some longstanding bugs around parsing data and even how the GUI is implemented since gtk3 used a lot of OO style architecture. Gtk4 is more about composition and I think will map a lot better to Rust than Gtk3 does. So I'm working on a demo application with all dummy data to get a sense of how it'll work in an adaptive interface but still be usable on a desktop.