dvorakmortonxd/freezmo
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

The scene stops heating the MacBook

Browse source 
"Terribly high CPU usage, the MacBook gets really hot" - a fanless MacBook
Air on a 144Hz screen. Measured on that machine with headed engines
(process CPU plus the per-process GPU time macOS keeps): an idle Aero
library cost LibreWolf ~110% CPU and ~230ms/s of GPU, the study feed ~130%,
Chromium up to ~57% CPU and ~350ms/s of GPU, Safari ~220-250ms/s of
WindowServer GPU. Priced one by one:

- the gradient mask on .ice-floats re-rendered the animated layer offscreen
  on every frame (~75 points of Gecko CPU). The floats now rise through a
  plain rectangular band clear of the header, the bottom chrome and the
  rail, and fade in and out inside it, so the clip never cuts a visible one;
- the overlay grain forced a backdrop readback per frame for a texture that
  measured a mean <=0.11/255 difference: removed;
- the invisible blob drift made every frame a full-screen redraw: the blobs
  are painted once;
- static glass (answer tiles, feedback panel, chips, inputs, dropzones,
  lists, segmented controls, Aero hint chips) re-blurred the moving scene
  every frame: only floating glass blurs now, and Aero's baked chat chrome
  drops a live blur that never showed under the bake;
- the scene also parks while the window has no focus and under any dialog
  or sheet scrim (.scene-pause); the loading icon is a compositor-run CSS
  animation instead of a framer-motion main-thread loop.

After, focused and animating: LibreWolf library 109% -> 33% CPU, study
134% -> 34%, chat 130% -> 42%; Chromium GPU 2.5-4.4x lower with 7-22 points
less CPU; Safari's WindowServer GPU -20-26% in Aero, about half in dark.
Unfocused or under a sheet: nothing. bubbles-test sweeps every float through
41 phases against the band and pins the parking and the cost contract;
tests/heat-probe.mjs (macOS) repeats the measurement; the suites find
Playwright's Chromium on macOS.

All 15 suites pass, lint clean, the contrast scan lost a finding. Version
0.6.7, SW v89.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
pepaskopec-blip 2026-10-15 19:39:29 +02:00
commit bfc0f806b9
27 changed files with 613 additions and 249 deletions
Download patch file Download diff file Expand all files Collapse all files

30
tests/lib.mjs
View file

@ -30,16 +30,26 @@ export const SPAWN_CWD = process.env.FREEZMO_SPAWN_CWD || REPO;
export function resolveChrome() {
if (process.env.CHROME && existsSync(process.env.CHROME)) return process.env.CHROME;
const root = path.join(os.homedir(), ".cache", "ms-playwright");
const dirs = existsSync(root)
? readdirSync(root)
.filter((entry) => /^chromium-\d+$/.test(entry))
.sort((a, b) => Number(b.split("-")[1]) - Number(a.split("-")[1]))
: [];
for (const dir of dirs) {
for (const sub of ["chrome-linux64", "chrome-linux"]) {
const candidate = path.join(root, dir, sub, "chrome");
if (existsSync(candidate)) return candidate;
const roots = [
path.join(os.homedir(), ".cache", "ms-playwright"),
path.join(os.homedir(), "Library", "Caches", "ms-playwright"),
];
const binaries = [
"chrome-linux64/chrome",
"chrome-linux/chrome",
"chrome-mac-arm64/Google Chrome for Testing.app/Contents/MacOS/Google Chrome for Testing",
"chrome-mac/Google Chrome for Testing.app/Contents/MacOS/Google Chrome for Testing",
"chrome-mac/Chromium.app/Contents/MacOS/Chromium",
];
for (const root of roots.filter((dir) => existsSync(dir))) {
const dirs = readdirSync(root)
.filter((entry) => /^chromium-\d+$/.test(entry))
.sort((a, b) => Number(b.split("-")[1]) - Number(a.split("-")[1]));
for (const dir of dirs) {
for (const sub of binaries) {
const candidate = path.join(root, dir, sub);
if (existsSync(candidate)) return candidate;
}
}
}
throw new Error(