Fiddler 之弱网测试(2G,3G,4G) |
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1、模拟弱网环境
打开Fiddler,Rules->Performance->勾选 Simulate Modem Speeds,勾选之后访问网站会发现网络慢了很多 2、Fiddler弱网的原理Rules—>Cutomize Rules打开CustomRules.js 文档 在文件中搜索关键字,m_SimulateModem 1. // Cause Fiddler to delay HTTP traffic to simulate typical 56k modem conditions public static RulesOption("Simulate &Modem Speeds", "Per&formance") var m_SimulateModem: boolean = false;2. if (m_SimulateModem) { // Delay sends by 300ms per KB uploaded. oSession["request-trickle-delay"] = "300"; // Delay receives by 150ms per KB downloaded. oSession["response-trickle-delay"] = "150"; }让我们来分析一下这几行代码: 首先来判断m_SimulateModem是否为true,也就是是否设置了弱网模式。 如果为弱网模式。则分析代码 oSession[“request-trickle-delay”] = “300”; 注释的也很明白,Delay sends by 300ms per KB uploaded.上传1KB需要300ms, 转化一下上传速度:1Kb/0.3s = 10/3(KB/s),也就是 3.33kb/s ,到达2G网络标准。 如果你想设置上传的速度为50KB/s,你则需要设置Delay 时间为 20ms 同样的方法,也可以限制上传的速度,调整oSession[“response-trickle-delay”]即可。 网络上行下载2G2.7K9.6K3G1.8M7.2M4G50M100M所以得出:2G网络配置 if (m_SimulateModem) { // Delay sends by 300ms per KB uploaded. oSession["request-trickle-delay"] = "300"; // Delay receives by 150ms per KB downloaded. oSession["response-trickle-delay"] = "150"; }3G 网络配置,3G 应该是2G网络估值的1000倍速率,也就是上行和下载除去1000。 if (m_SimulateModem) { // Delay sends by 300ms per KB uploaded. oSession["request-trickle-delay"] = "0.3"; // Delay receives by 150ms per KB downloaded. oSession["response-trickle-delay"] = "0.15"; }4G网络配置,上行为3G的25倍,下载为15倍,放开延迟即可。 |
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