(The "perspective HTTP Protocol" column has been with you for nearly three months. In the last two lectures, I will integrate the scattered knowledge points in the previous chapters, make a summary, and talk about HTTP performance optimization with you.Since the optimization of HTTPS (SSL / TLS) has been introduced in detail in lecture 28, we'll skip it this time. Let's find a chance to review after class.Since we want to optimize performance, we need to know: what is performance? What indicators does it have, how should it be measured, and what methods should be taken to optimize it?"Performance" is actually a complex concept. Different people and different application scenarios will have different definitions of it. For HTTP, it is a very complex system with many roles, and its performance is difficult to describe in one or two simple words.Let's start with the most basic "request response" model of HTTP. There are two roles in the model: client and server, and intermediate transmission link. You can view these three sections when checking performance.)
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