JS - 利用performance.timing进行性能分析
发布日期:2021-10-02 12:55:45 浏览次数:0 分类:技术文章
window.onload = function(){
       setTimeout(function(){
           let t = performance.timing        console.log('DNS查询耗时 :' + (t.domainLookupEnd - t.domainLookupStart).toFixed(0))        console.log('TCP链接耗时 :' + (t.connectEnd - t.connectStart).toFixed(0))        console.log('request请求耗时 :' + (t.responseEnd - t.responseStart).toFixed(0))        console.log('解析dom树耗时 :' + (t.domComplete - t.domInteractive).toFixed(0))        console.log('白屏时间 :' + (t.responseStart - t.navigationStart).toFixed(0))        console.log('domready时间 :' + (t.domContentLoadedEventEnd - t.navigationStart).toFixed(0))        console.log('onload时间 :' + (t.loadEventEnd - t.navigationStart).toFixed(0))        if(t = performance.memory){
               console.log('js内存使用占比 :' + (t.usedJSHeapSize / t.totalJSHeapSize * 100).toFixed(2) + '%')        }    })}
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