# Żmij

[github](https://github.com/dtolnay/zmij)
[crates.io](https://crates.io/crates/zmij)
[docs.rs](https://docs.rs/zmij)
[build status](https://github.com/dtolnay/zmij/actions?query=branch%3Amaster)

Pure Rust implementation of Żmij, an algorithm to quickly convert floating point
numbers to decimal strings.

This Rust implementation is a line-by-line port of Victor Zverovich's
implementation in C++, [https://github.com/vitaut/zmij][upstream].

[upstream]: https://github.com/vitaut/zmij/tree/b35b64a2ba63da9ea7c0a72fd2651e89743966c9

## Example

```rust
fn main() {
    let mut buffer = zmij::Buffer::new();
    let printed = buffer.format(1.234);
    assert_eq!(printed, "1.234");
}
```

## Performance

The [dtoa-benchmark] compares this library and other Rust floating point
formatting implementations across a range of precisions. The vertical axis in
this chart shows nanoseconds taken by a single execution of
`zmij::Buffer::new().format_finite(value)` so a lower result indicates a faster
library.

[dtoa-benchmark]: https://github.com/dtolnay/dtoa-benchmark

![performance](https://raw.githubusercontent.com/dtolnay/zmij/master/dtoa-benchmark.png)

#### License

MIT license.
