jsonpath_lib 0.1.12

It is JsonPath engine written in Rust. it provide a similar API interface in Webassembly and Javascript also. - Webassembly Demo: https://freestrings.github.io/jsonpath
Documentation 
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#![feature(test)]
extern crate jsonpath_lib as jsonpath;
extern crate serde;
extern crate serde_json;
extern crate test;
extern crate bencher;

use std::io::Read;

use serde::Deserialize;
use serde_json::Value;

use self::test::Bencher;
use jsonpath::ref_value::model::RefValue;
use serde::ser::Serialize;

fn read_json(path: &str) -> String {
    let mut f = std::fs::File::open(path).unwrap();
    let mut contents = String::new();
    f.read_to_string(&mut contents).unwrap();
    contents
}

fn get_string() -> String {
    read_json("./benches/example.json")
}

fn get_json() -> Value {
    let string = get_string();
    serde_json::from_str(string.as_str()).unwrap()
}

fn get_path() -> &'static str {
    r#"$..book[?(@.price<30 && @.category=="fiction")]"#
}

#[bench]
fn bench_selector(b: &mut Bencher) {
    let json = get_json();
    let mut selector = jsonpath::selector(&json);
    b.iter(move || {
        for _ in 1..100 {
            let _ = selector(get_path()).unwrap();
        }
    });
}

#[bench]
fn bench_selector_as(b: &mut Bencher) {
    let json = get_json();
    let mut selector = jsonpath::selector_as::<Value>(&json);
    b.iter(move || {
        for _ in 1..100 {
            let _ = selector(get_path()).unwrap();
        }
    });
}

#[bench]
fn bench_select_val(b: &mut Bencher) {
    let json = get_json();
    b.iter(move || {
        for _ in 1..100 {
            let _ = jsonpath::select(&json, get_path()).unwrap();
        }
    });
}

#[bench]
fn bench_select_as_str(b: &mut Bencher) {
    let json = get_string();
    b.iter(move || {
        for _ in 1..100 {
            let _ = jsonpath::select_as_str(&json, get_path()).unwrap();
        }
    });
}

#[bench]
fn bench_compile(b: &mut Bencher) {
    let json = get_json();
    let mut template = jsonpath::compile(get_path());
    b.iter(move || {
        for _ in 1..100 {
            let _ = template(&json).unwrap();
        }
    });
}

#[bench]
fn bench_select_as(b: &mut Bencher) {
    let json = get_string();

    #[derive(Deserialize, PartialEq, Debug)]
    struct Book {
        category: String,
        author: String,
        title: String,
        price: f64,
    }

    b.iter(move || {
        for _ in 1..100 {
            let _: Book = jsonpath::select_as(&json, r#"$..book[?(@.price<30 && @.category=="fiction")][0]"#).unwrap();
        }
    });
}

#[bench]
fn bench_serde_ser(b: &mut Bencher) {
    let json = get_json();

    b.iter(move || {
        for _ in 1..100 {
            let _: RefValue = json.serialize(jsonpath::ref_value::ser::Serializer).unwrap().into();
        }
    });
}

#[bench]
fn bench_serde_de(b: &mut Bencher) {
    let json_string = get_string();
    let json_str = json_string.as_str();

    b.iter(move || for _ in 1..100 {
        let _: RefValue = serde_json::from_str(json_str).unwrap();
    });
}