客户端一侧统计 https 比 http 平均响应时长更短

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工作业务准备迁到 https，前期做了一下响应时长的布点：

两波用户，地区分布均匀，分别使用 https 和 http 协议，均为 HTTP/1.1，访问相同机房的相同 API，客户端网络访问代码相同，客户端计算响应时长并上报。

统计了总共约 300W 条上报数据，平均响应时间表现来看 https 比 http 更低，但响应长度越大差距倾向于越不明显:

API 1 http 261.048
API 1 https 249.078
API 2 http 150.849
API 2 https 123.712
API 3 http 146.97
API 3 https 120.916

PS. HTTPS 配置的 ssllabs 评分是搞到了 A 的。客户端可能有一定的连接复用和 session 复用，对耗时的 TLS 连接建立有优化，但是不应该导致速度比明文 HTTP 更快。服务端没有开启 HTTP/2 支持。

不负责的猜测，跟运营商的区别对待有关？

Supplement 1 · Jun 26, 2017

@chyiz 按运营商区分来看结果依然不变但是运营商之间有差异：

联通响应时长最短，http https 之间的响应时长区别最小

API1,http,"电信","274.099"
API1,http,"移动","267.439"
API1,http,"联通","226.94"
API1,https,"电信","262.256"
API1,https,"移动","243.831"
API1,https,"联通","226.895"

API2,http,"电信","171.282"
API2,http,"移动","146.408"
API2,http,"联通","122.674"
API2,https,"电信","139.106"
API2,https,"移动","118.017"
API2,https,"联通","103.555"

API3,http,"移动","158.519"
API3,http,"电信","145.02"
API3,http,"联通","121.443"
API3,https,"电信","125.653"
API3,https,"移动","124.369"
API3,https,"联通","105.512"

BGP 多线机房。

Supplement 2 · Jun 26, 2017

@drolmen 貌似淘宝全站 HTTPS 后确实有 HTTPS 性能更好的言论：

『而据阿里巴巴技术保障部技术专家李振宇介绍，阿里电商在启用全站 HTTPS 后，性能不降反升，用户访问网站和移动端更为流畅。』

https://yq.aliyun.com/articles/2978

看了一下浏览器的请求协议还是 HTTP/1.1。

API

响应

上报

客户端

17 replies • 2017-06-26 16:43:28 +08:00