自动化性能测试

这段代码加到前端页面，拿到数据后传给后端，就可以统计性能测试数据

const per = window.performance;
console.log(`内存占用：${(per.memory.usedJSHeapSize/1024/1024).toFixed(2)}mb`)
console.log(`TCP连接耗时：${per.timing.connectEnd - per.timing.connectStart}ms`)
console.log(`响应耗时：${per.timing.responseEnd - per.timing.responseStart}ms`)
window.onload = function () {
    console.log(`DOM渲染耗时：${per.timing.domComplete - per.timing.domLoading}ms`)
}