jzon-rs

Zero-copy JSON for Rust with compile-time generated parsers.

Quick Start

[dependencies]
jzon-rs = "0.1"

use jzon::{ToJson, FromJson};

#[derive(ToJson, FromJson)]
struct Event<'a> {
    id: u64,
    name: &'a str,   // zero-copy — points directly into the input buffer
    tags: Vec<&'a str>,
}

fn main() {
    let src = r#"{"id":1,"name":"launch","tags":["rust","json"]}"#;
    let ev: Event = Event::from_json_str(src).unwrap();
    println!("{}", ev.to_json_string());
}

Highlights

• Zero-copy — &'a str fields borrow directly from the input; no heap allocation for string data.
• SIMD scanning — uses vectorised byte-search on x86-64 and aarch64 for structural character detection.
• No unsafe in user code — the derive macros emit fully safe Rust.
• serde attribute compatibility — #[serde(rename = "…")], #[serde(skip_serializing_if)], etc. are honoured by the derive macros.

Performance

Benchmarked on Apple M2, rustc 1.78, release mode, criterion 0.5.

Other Crates

License

MIT

Made with ❤️ by Rajaniraiyn