js获取当前网速
function networkSpeed() {
let startTime = Date.now();
let xhr = new XMLHttpRequest();
xhr.open("GET", "https://upload.wikimedia.org/wikipedia/commons/2/2d/Snake_River_%285mb%29.jpg");
xhr.onload = function () {
let duration = (Date.now() - startTime) / 1000;
let size = xhr.getResponseHeader("Content-Length") / 1024 / 1024; // 图片大小5M
let speed = (size / duration).toFixed(2);
console.log(speed + "mb/s当前网速 ");
};
xhr.send();
console.log(navigator.hardwareConcurrency)
}
js大致获当前cpu占用率
function getCpu() {
let data = [];
let t;
let getNow = function () {
return new Date().getTime();
};
let date = getNow();
function pulse() {
t && data.push(Date.now() - t);
t = Date.now();
let set = setTimeout(pulse, 50);
let nums = ""; // 50 - 55 正常、 55 - 60 轻微卡顿、 60 以上卡顿
(getNow() - date) / 1000 > 1 && (nums = (data.reduce((a, b) => a + b) / data.length).toFixed(2));
(getNow() - date) / 1000 > 1 && console.log(nums);
(getNow() - date) / 1000 > 1 && clearTimeout(set);
}
pulse()
}
