in src/utils/getFps.ts [12:26]
const loop = function() {
const offset = Date.now() - last;
fps += 1;
if (offset >= 1000) {
last += offset;
callback(fps);
if (maxCount) count += 1;
fps = 0;
}
if (!maxCount || count <= maxCount) {
requestAnimationFrame(loop);
}
};