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‎README.md‎

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# codspeed-rust
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<div align="center">
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<h1>codspeed-rust</h1>
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[![CI](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml)
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![Crates.io](https://img.shields.io/crates/v/cargo-codspeed)
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</div>
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This mono-repo contains the integration crates for using CodSpeed in Rust:
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‎crates/bencher_compat/README.md‎

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# codspeed-bencher-compat
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<div align="center">
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<h1>codspeed-bencher-compat</h1>
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[![CI](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml)
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![Crates.io](https://img.shields.io/crates/v/codspeed-bencher-compat)
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Bencher compatibility layer for CodSpeed
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</div>
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## Installation
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```sh
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cargo add --dev codspeed-bencher-compat
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```
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## Usage
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Let's start with the example from the [Bencher documentation](https://docs.rs/bencher/latest/bencher/),
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creating a benchmark suite for 2 simple functions (in `benches/example.rs`):
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```rust
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use bencher::{benchmark_group, benchmark_main, Bencher};
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fn a(bench: &mut Bencher) {
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bench.iter(|| {
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(0..1000).fold(0, |x, y| x + y)
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})
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}
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fn b(bench: &mut Bencher) {
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const N: usize = 1024;
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bench.iter(|| {
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vec![0u8; N]
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});
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bench.bytes = N as u64;
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}
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benchmark_group!(benches, a, b);
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benchmark_main!(benches);
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```
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The last step in creating the Bencher benchmark is to add the new benchmark target in your `Cargo.toml`:
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```toml title="Cargo.toml"
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[[bench]]
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name = "example"
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harness = false
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```
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### Plugging CodSpeed
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To allow CodSpeed to interact with this suite as well, you simply need to replace
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the imports from the `bencher` crate to the `codspeed-bencher-compat` crate:
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```diff
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- use bencher::{benchmark_group, benchmark_main, Bencher};
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+ use codspeed_bencher_compat::{benchmark_group, benchmark_main, Bencher};
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```
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And that's it! You can now run your benchmark suite with CodSpeed:
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```
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$ cargo codspeed build
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Finished release [optimized] target(s) in 0.12s
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Finished built 1 benchmark suite(s)
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$ cargo codspeed run
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Collected 1 benchmark suite(s) to run
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Running example
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Using codspeed-bencher-compat v1.0.0 compatibility layer
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NOTICE: codspeed is enabled, but no performance measurement will
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be made since it's running in an unknown environment.
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Checked: benches/example.rs::a (group: benches)
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Checked: benches/example.rs::b (group: benches)
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Done running bencher_example
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Finished running 1 benchmark suite(s)
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```

‎crates/cargo-codspeed/README.md‎

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# cargo-codspeed
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<div align="center">
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<h1>cargo-codspeed</h1>
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[![CI](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml)
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![Crates.io](https://img.shields.io/crates/v/cargo-codspeed)
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A cargo subcommand for running CodSpeed on your project
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</div>
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## Installation
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```bash
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cargo install cargo-codspeed
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```
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## Usage
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```
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Usage: cargo codspeed <COMMAND>
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Commands:
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build Build the benchmarks
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run Run the previously built benchmarks
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Options:
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-h, --help Print help information
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-V, --version Print version information
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```

‎crates/codspeed/README.md‎

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# codspeed
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<div align="center">
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<h1>codspeed</h1>
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[![CI](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml)
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![Crates.io](https://img.shields.io/crates/v/codspeed)
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The core library used to integrate with Codspeed runners
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</div>
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For now, this crate should not be used directly. Instead, use one of the integration crates:
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- `codspeed-bencher-compat`
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- `codspeed-criterion-compat`

‎crates/criterion_compat/README.md‎

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# codspeed-criterion-compat
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<div align="center">
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<h1>codspeed-criterion-compat</h1>
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### Not supported yet
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[![CI](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/CodSpeedHQ/codspeed-rust/actions/workflows/ci.yml)
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![Crates.io](https://img.shields.io/crates/v/codspeed-criterion-compat)
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- AsyncBencher (Criterion)
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Criterion.rs compatibility layer for CodSpeed
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</div>
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## Installation
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```sh
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cargo add --dev codspeed-criterion-compat
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```
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## Usage
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Let's start with the example from the [Criterion.rs documentation](https://bheisler.github.io/criterion.rs/book/getting_started.html),
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creating a benchmark suite for the Fibonacci function (in `benches/my_benchmark.rs`):
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```rust
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use criterion::{black_box, criterion_group, criterion_main, Criterion};
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fn fibonacci(n: u64) -> u64 {
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match n {
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0 => 1,
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1 => 1,
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n => fibonacci(n-1) + fibonacci(n-2),
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}
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}
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pub fn criterion_benchmark(c: &mut Criterion) {
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c.bench_function("fib 20", |b| b.iter(|| fibonacci(black_box(20))));
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}
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criterion_group!(benches, criterion_benchmark);
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criterion_main!(benches);
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```
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The last step in creating the Criterion benchmark is to add the new benchmark target in your `Cargo.toml`:
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```toml title="Cargo.toml"
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[[bench]]
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name = "my_benchmark"
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harness = false
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```
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### Plugging CodSpeed
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To allow CodSpeed to interact with this suite as well, you simply need to replace
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the imports from the `criterion` crate to the `codspeed-criterion-compat` crate:
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```diff
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- use criterion::{black_box, criterion_group, criterion_main, Criterion};
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+ use codspeed_criterion_compat::{black_box, criterion_group, criterion_main, Criterion};
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```
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And that's it! You can now run your benchmark suite with `cargo-codspeed`:
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```
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$ cargo codspeed build
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Finished release [optimized] target(s) in 0.12s
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Finished built 1 benchmark suite(s)
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$ cargo codspeed run
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Collected 1 benchmark suite(s) to run
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Running my_benchmark
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Using codspeed-criterion-compat v1.0.0 compatibility layer
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NOTICE: codspeed is enabled, but no performance measurement will be made since it's running in an unknown environment.
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Checked: benches/bencher_example.rs::fib_20 (group: benches)
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Done running bencher_example
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Finished running 1 benchmark suite(s)
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```
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### Not supported yet:
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- AsyncBencher

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