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5.6.9 提问:使⽤HTTP/2协议与使⽤HTTP/1.1协议相⽐,CSS和JS⽂件加载和性能有何改进?

HTTP/2协议与HTTP/

1.1协议对CSS和JS⽂件加载性能的改进在使⽤HTTP/2协议相⽐于HTTP/

1.1协议时,CSS和JS⽂件加载性能有以下改进:

1. 多路复⽤:HTTP/2⽀持多路复⽤,可以并⾏请求多个资源,⽽HTTP/

1.1则需要通过多次请求和响应来完成,提⾼了页⾯加载速度。⽰例:HTTP/

1.1协议下的请求示例:GET /styles.css HTTP/

1.1 Host: example.comGET /app.js HTTP/

1.1 Host: example.comHTTP/2协议下的请求示例:GET /styles.css HTTP/2 GET /app.js HTTP/2

2. ⼆进制传输:HTTP/2协议使⽤⼆进制格式传输数据,减少了传输的开销和⽂件⼤⼩,提⾼了加载速度。

3. 头部压缩:HTTP/2协议⽀持头部压缩,减少了请求头的⼤⼩,减少了传输延迟。

4. 服务器推送:HTTP/2协议⽀持服务器主动推送资源给客户端,避免了客户端的重复请求,提⾼了性能。这些改进使得使⽤HTTP/2协议加载CSS和JS⽂件相较于HTTP/

1.1协议更加⾼效和快速。

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