Crate benchmark_simple

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Expand description


A tiny benchmarking library for Rust.

  • Trivial to use
  • Works pretty much everywhere, including WebAssembly (WASI, but also in-browser)
use benchmark_simple::*;

fn test_function() {
    // ...

let bench = Bench::new();
let mut options = Options::default();
let res =, || test_function());
println!("result: {}", res);

Throughput computation:

use benchmark_simple::*;

fn test_function(m: &mut [u8]) {
    // ...

let mut m = vec![0u8; 1_000_000];
let bench = Bench::new();
let options = Options::default();
let res =, || test_function(&mut m));
let throughput = res.throughput(m.len() as _);
println!("throughput: {}", throughput);


pub struct Options {
    /// Number of iterations to perform.
    pub iterations: u64,
    /// Number of warm-up iterations to perform.
    pub warmup_iterations: u64,
    /// Minimum number of samples to collect.
    pub min_samples: usize,
    /// Maximum number of samples to collect.
    pub max_samples: usize,
    /// Maximum RSD to tolerate (in 0...100).
    pub max_rsd: f64,
    /// Maximum benchmark duration time.
    pub max_duration: Option<std::time::Duration>,
    /// Verbose output.
    pub verbose: bool,

Benchmark results can be made verbose by setting verbose to true in the Options struct, or by defining a BENCHMARK_VERBOSE environment variable.



  • Force the compiler to avoid optimizing away a value that is computed for benchmarking purposes, but not used afterwards.