itoa
====

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

This crate provides a fast conversion of integer primitives to decimal strings.
The implementation comes straight from [libcore] but avoids the performance
penalty of going through [`core::fmt::Formatter`].

See also [`zmij`] for printing floating point primitives.

[libcore]: https://github.com/rust-lang/rust/blob/1.92.0/library/core/src/fmt/num.rs#L190-L253
[`core::fmt::Formatter`]: https://doc.rust-lang.org/std/fmt/struct.Formatter.html
[`zmij`]: https://github.com/dtolnay/zmij

```toml
[dependencies]
itoa = "1.0"
```


## Example

```rust
fn main() {
    let mut buffer = itoa::Buffer::new();
    let printed = buffer.format(128u64);
    assert_eq!(printed, "128");
}
```


## Performance

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

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

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

#### License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

