JS13K game test

lib.rs

#![no_std]
#![feature(maybe_uninit_ref)]

extern crate alloc;

use core::f64::consts::PI;
//use no_panic::no_panic;

use wasm_bindgen::prelude::*;

use web_sys::*;

// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
// allocator.
#[cfg(feature = "wee_alloc")]
#[global_allocator]
static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;

static mut C_X: f64 = 100_f64;
static mut C_Y: f64 = 100_f64;

#[wasm_bindgen]
pub fn render_frame(ctx: CanvasRenderingContext2d, time: f64) {
    unsafe {
        C_X += 50_f64 * time.sin();
        C_Y += 50_f64 * time.cos();

        ctx.arc(C_X, C_Y, 100_f64, 0_f64, 2_f64 * PI);
    }
}

twiggy-dominators.txt

 Retained Bytes │ Retained % │ Dominator Tree
────────────────┼────────────┼───────────────────────────────────────────────────────────────────────────────────
           8641 ┊     98.80% ┊ export "render_frame"
           8626 ┊     98.63% ┊   ⤷ code[9]
           8611 ┊     98.46% ┊       ⤷ code[4]
           5239 ┊     59.90% ┊           ⤷ code[1]
           3150 ┊     36.02% ┊               ⤷ code[0]
             69 ┊      0.79% ┊                   ⤷ data[2]
             37 ┊      0.42% ┊                   ⤷ code[6]
              8 ┊      0.09% ┊                   ⤷ type[4]: (i32, i32, i32, i32) -> i32
           1180 ┊     13.49% ┊           ⤷ data[1]
            867 ┊      9.91% ┊           ⤷ code[2]
            840 ┊      9.60% ┊           ⤷ code[3]
            251 ┊      2.87% ┊           ⤷ code[5]
             59 ┊      0.67% ┊               ⤷ import ./js13k_test_rs.js::__widl_f_arc_CanvasRenderingContext2D
             53 ┊      0.61% ┊               ⤷ code[7]
              7 ┊      0.08% ┊               ⤷ type[5]: (i32, i32, f64, f64) -> nil
             48 ┊      0.55% ┊           ⤷ import ./js13k_test_rs.js::__wbindgen_object_drop_ref
             18 ┊      0.21% ┊           ⤷ data[0]
              8 ┊      0.09% ┊           ⤷ global[0]
              5 ┊      0.06% ┊           ⤷ type[3]: (f64) -> f64
              5 ┊      0.06% ┊       ⤷ type[1]: (i32, f64) -> nil
             47 ┊      0.54% ┊ export "__wbindgen_exn_store"
             24 ┊      0.27% ┊   ⤷ code[8]
             11 ┊      0.13% ┊ export "memory"
              2 ┊      0.02% ┊   ⤷ memory[0]
              8 ┊      0.09% ┊ wasm magic bytes
              7 ┊      0.08% ┊ code section headers
              4 ┊      0.05% ┊ type[0]: (i32) -> nil
              4 ┊      0.05% ┊ data section headers
              3 ┊      0.03% ┊ type section headers
              3 ┊      0.03% ┊ import section headers
              3 ┊      0.03% ┊ memory section headers
              3 ┊      0.03% ┊ global section headers
              3 ┊      0.03% ┊ export section headers
              9 ┊      0.10% ┊ [1 Unreachable Items]