Crate diol

diol is a benchmarking library for rust.

getting started

add the following to your Cargo.toml.

[dev-dependencies]
diol = "0.6.0"

[[bench]]
name = "my_benchmark"
harness = false

then in benches/my_benchmark.rs.

use diol::prelude::*;

fn main() -> std::io::Result<()> {
    let mut bench = Bench::new(BenchConfig::from_args());
    bench.register(slice_times_two, [4, 8, 16, 128, 1024]);
    bench.run()?;
    Ok(())
}

fn slice_times_two(bencher: Bencher, len: usize) {
    let mut v = vec![0.0_f64; len];
    bencher.bench(|| {
        for x in &mut v {
            *x *= 2.0;
        }
        black_box(&mut v);
    });
}

run the benchmark with cargo bench, or cargo bench --bench my_benchmark if you have multiple benchmarks you can also pass in benchmark options using cargo bench --bench my_benchmark -- [OPTIONS...]

╭─────────────────┬──────┬───────────┬───────────┬───────────┬───────────╮
│ benchmark       │ args │   fastest │    median │      mean │    stddev │
├─────────────────┼──────┼───────────┼───────────┼───────────┼───────────┤
│ slice_times_two │    4 │  29.61 ns │  34.38 ns │  34.83 ns │   1.62 ns │
├─────────────────┼──────┼───────────┼───────────┼───────────┼───────────┤
│ slice_times_two │    8 │  44.17 ns │  53.04 ns │  53.32 ns │   3.25 ns │
├─────────────────┼──────┼───────────┼───────────┼───────────┼───────────┤
│ slice_times_two │   16 │  93.66 ns │ 107.91 ns │ 108.13 ns │   4.11 ns │
├─────────────────┼──────┼───────────┼───────────┼───────────┼───────────┤
│ slice_times_two │  128 │ 489.97 ns │ 583.59 ns │ 585.28 ns │  33.15 ns │
├─────────────────┼──────┼───────────┼───────────┼───────────┼───────────┤
│ slice_times_two │ 1024 │   3.77 µs │   4.51 µs │   4.53 µs │ 173.44 ns │
╰─────────────────┴──────┴───────────┴───────────┴───────────┴───────────╯

Modules

• config
  benchmark configuration
• prelude
  re-exports of useful types and traits.
• result
  benchmark result output.
• traits
  helper traits and types
• variadics
  variadic tuple type.

Macros

• List
  type of a variadic tuple containing the given types.
• list
  create or destructure a variadic tuple containing the given values.

Structs

• Bench
  main benchmark entry point, used to register functions and arguments, then run benchmarks.
• Bencher
  bench loop runner.
• Picoseconds
  extra-precise duration type for short-ish durations.
• PlotArg
  argument type that marks the benchmark functions as plottable.