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
|
#![cfg(target_arch = "wasm32")]
//! Per-frame profile buffer for the render pipeline.
//!
//! Sub-span timings are recorded into a thread-local during `renderFrame`
//! and drained by JS via `getLastFrameProfile()`.
use std::cell::RefCell;
use js_sys::{Array, Object, Reflect};
use wasm_bindgen::{JsValue, prelude::wasm_bindgen};
thread_local! {
static LAST_FRAME_PROFILE: RefCell<Vec<(&'static str, f64)>> = const { RefCell::new(Vec::new()) };
}
pub(crate) fn now_ms() -> f64 {
web_sys::window()
.and_then(|window| window.performance())
.map(|performance| performance.now())
.unwrap_or(0.0)
}
pub(crate) fn reset() {
LAST_FRAME_PROFILE.with(|cell| cell.borrow_mut().clear());
}
pub(crate) fn record(name: &'static str, duration_ms: f64) {
LAST_FRAME_PROFILE.with(|cell| cell.borrow_mut().push((name, duration_ms)));
}
#[wasm_bindgen(js_name = getLastFrameProfile)]
pub fn get_last_frame_profile() -> Array {
LAST_FRAME_PROFILE.with(|cell| {
let entries = cell.borrow();
let array = Array::new_with_length(entries.len() as u32);
for (index, (name, duration_ms)) in entries.iter().enumerate() {
let entry = Object::new();
Reflect::set(&entry, &JsValue::from_str("name"), &JsValue::from_str(name))
.expect("set name");
Reflect::set(
&entry,
&JsValue::from_str("durationMs"),
&JsValue::from_f64(*duration_ms),
)
.expect("set durationMs");
array.set(index as u32, entry.into());
}
array
})
}
|
