June 2021
Intermediate to advanced
290 pages
9h 21m
Chinese
Content preview from Node与Express开发（第2版）
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255
一个网站分析核查清单（它甚至可以成为
QA
核查清单的一部分）。这个核查清单应该是
一个“活文档”，因为在网站的生命周期中，你或你的客户可能会不断地调整清单中条目
的优先级来体现什么内容最重要。
22.1.8
优化性能
一个又一个研究表明，网站的性能对流量有显著的影响。这是一个快节奏的世界，人们都
期望他们的内容快速地到达，尤其是在移动平台上。在性能调优中，首要的原则是
先剖
析
，
再优化
。“剖析”意味着找出到底是什么实际拖慢了你的网站。如果你花了数天时间
来加快内容渲染，结果问题却是出在社交媒体插件上，那就浪费了宝贵的时间和金钱。
谷歌的
PageSpeed Insights
是非常好的衡量网站性能的方法
（而且现在
PageSpeed
的数据是
记录在谷歌的
Analytics
里的
，因此你可以监控到网站的性能趋势）。它不仅会针对移动和
桌面给出总体的性能评分，而且提出了按优先级排序提升性能的建议。
除非你当前就有性能问题，否则周期性的性能核查（监控
Google Analytics
，看看性能评分
有没有显著的变化，这应该就够了）可能是不必要的。不过，在提升性能之后，就能看到
网站的流量增长，还是很让人高兴的。
22.1.9
优先跟踪潜在客户
在互联网世界，访问者如果对你的产品或服务感兴趣，能给你的最强信号就是联系信息。
你应当十分认真地对待这些信息。收集邮箱地址或电话号码的表单应当经过例行的测试，
而这个测试应当成为
QA
核对清单的一个部分
。而且在收集信息的时候，总是应当有一个
补充的存储方案。最糟糕的事情莫过于，你收集到了一个潜在客户的联系信息却又把它弄 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.