mlua 0.10.5

High level bindings to Lua 5.4/5.3/5.2/5.1 (including LuaJIT) and Luau with async/await features and support of writing native Lua modules in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90

use std::time::Duration;

use criterion::{criterion_group, criterion_main, BatchSize, Criterion};

use mlua::prelude::*;

fn collect_gc_twice(lua: &Lua) {
    lua.gc_collect().unwrap();
    lua.gc_collect().unwrap();
}

fn encode_json(c: &mut Criterion) {
    let lua = Lua::new();

    let encode = lua
        .create_function(|_, t: LuaValue| Ok(serde_json::to_string(&t).unwrap()))
        .unwrap();
    let table = lua
        .load(
            r#"{
        name = "Clark Kent",
        address = {
            city = "Smallville",
            state = "Kansas",
            country = "USA",
        },
        age = 22,
        parents = {"Jonathan Kent", "Martha Kent"},
        superman = true,
        interests = {"flying", "saving the world", "kryptonite"},
    }"#,
        )
        .eval::<LuaTable>()
        .unwrap();

    c.bench_function("serialize json", |b| {
        b.iter_batched(
            || collect_gc_twice(&lua),
            |_| {
                encode.call::<LuaString>(&table).unwrap();
            },
            BatchSize::SmallInput,
        );
    });
}

fn decode_json(c: &mut Criterion) {
    let lua = Lua::new();

    let decode = lua
        .create_function(|lua, s: String| {
            lua.to_value(&serde_json::from_str::<serde_json::Value>(&s).unwrap())
        })
        .unwrap();
    let json = r#"{
        "name": "Clark Kent",
        "address": {
            "city": "Smallville",
            "state": "Kansas",
            "country": "USA"
        },
        "age": 22,
        "parents": ["Jonathan Kent", "Martha Kent"],
        "superman": true,
        "interests": ["flying", "saving the world", "kryptonite"]
    }"#;

    c.bench_function("deserialize json", |b| {
        b.iter_batched(
            || collect_gc_twice(&lua),
            |_| {
                decode.call::<LuaTable>(json).unwrap();
            },
            BatchSize::SmallInput,
        );
    });
}

criterion_group! {
    name = benches;
    config = Criterion::default()
        .sample_size(500)
        .measurement_time(Duration::from_secs(10))
        .noise_threshold(0.02);
    targets =
        encode_json,
        decode_json,
}

criterion_main!(benches);