https://github.com/dtolnay/dtoa

Fast functions for printing floating-point primitives to a decimal string
https://github.com/dtolnay/dtoa

performance rust

Last synced: about 1 year ago
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Fast functions for printing floating-point primitives to a decimal string

• Host: GitHub
• URL: https://github.com/dtolnay/dtoa
• Owner: dtolnay
• License: apache-2.0
• Created: 2016-06-27T09:41:01.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2025-04-25T02:40:48.000Z (about 1 year ago)
• Last Synced: 2025-05-03T01:56:24.031Z (about 1 year ago)
• Topics: performance, rust
• Language: Rust
• Homepage:
• Size: 438 KB
• Stars: 125
• Watchers: 5
• Forks: 13
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE-APACHE

Awesome Lists containing this project

README

          
dtoa

====

[](https://github.com/dtolnay/dtoa)

[](https://crates.io/crates/dtoa)

[](https://docs.rs/dtoa)

[](https://github.com/dtolnay/dtoa/actions?query=branch%3Amaster)

This crate provides fast conversion of floating point primitives to decimal

strings. The implementation is a straightforward Rust port of [Milo Yip]'s C++

implementation [dtoa.h]. The original C++ code of each function is included in

comments.

See also [`itoa`] for printing integer primitives.

*Version requirement: rustc 1.36+*

[Milo Yip]: https://github.com/miloyip

[dtoa.h]: https://github.com/miloyip/rapidjson/blob/master/include/rapidjson/internal/dtoa.h

[`itoa`]: https://github.com/dtolnay/itoa

```toml

[dependencies]

dtoa = "1.0"

```




## Example

```rust

fn main() {

    let mut buffer = dtoa::Buffer::new();

    let printed = buffer.format(2.71828f64);

    assert_eq!(printed, "2.71828");

}

```




## Performance (lower is better)

![performance](https://raw.githubusercontent.com/dtolnay/dtoa/master/performance.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.