数据安全平台双十二优惠活动

// 使用异步加载JavaScript文件
function loadScript(url, callback) {
    var script = document.createElement("script");
    script.type = "text/javascript";
    if (script.readyState) { // IE
        script.onreadystatechange = function () {
            if (script.readyState == "loaded" || script.readyState == "complete") {
                script.onreadystatechange = null;
                callback();
            }
        };
    } else { // Others
        script.onload = function () {
            callback();
        };
    }
    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
}

// 异步加载多个脚本
loadScript("https://example.com/script1.js", function () {
    loadScript("https://example.com/script2.js", function () {
        // 所有脚本加载完成后的操作
    });
});

const express = require('express');
const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').cpus().length;

if (cluster.isMaster) {
    console.log(`Master ${process.pid} is running`);

    // Fork workers.
    for (let i = 0; i < numCPUs; i++) {
        cluster.fork();
    }

    cluster.on('exit', (worker, code, signal) => {
        console.log(`worker ${worker.process.pid} died`);
    });
} else {
    // Workers can share any TCP connection
    // In this case it is an HTTP server
    http.createServer((req, res) => {
        res.writeHead(200);
        res.end('hello world\n');
    }).listen(8000);

    console.log(`Worker ${process.pid} started`);
}