Azure 网站提供静态 JS/CSS 但不是二进制的速度很慢 [英] Azure Website slow to serve static JS/CSS but not binary

问题描述

我有一个 Azure 网站/Web 应用程序，它提供静态 JS 和 CSS 文件的速度非常慢，但提供二进制文件似乎非常好.

I have an Azure Website/Web App that is incredibly slow to serve static JS and CSS files but seems perfectly fine serving binary.

为了测试问题，我上传了两个 30MB 的文件，一个是 big.js，另一个是 big.rar.如果幸运的话，JS 文件的下载速度约为 100KB/s.RAR 文件的下载速度约为 4,000KB/s.结果非常一致.

To test the problem I uploaded two 30MB files, one big.js and the other big.rar. The JS file downloads at around 100KB/s if I'm lucky. The RAR file downloads at around 4,000KB/s. The results are extremely consistent.

我已经检查了 Fiddler，并且在这两种情况下都发生了 gzip 压缩.正如预期的那样，JS 文件使用 MIME 类型 application/x-javascript 发送，而 RAR 文件作为 application/octet-stream 发送.

I've checked in Fiddler and gzip compression is occurring in both cases. As expected, the JS file is being sent with the MIME type application/x-javascript whereas the RAR file is being served as application/octet-stream.

我很难理解这一点 - 为什么 IIS 提供一种类型的静态内容比另一种慢得多?

I am struggling to understand this - why would IIS serve one type of static content so much slower than another?

推荐答案

我们遇到了这个问题，并在 Azure 支持团队的帮助下解决了这个问题.问题是慢速文件会使用 TransferEncoding: Chuncked.他们建议我们强制静态压缩来解决这个问题.

We had this issue, and was able to resolve this with the help of Azure Support Team. The issue was that the slow files would use TransferEncoding: Chuncked. They suggested that we force static compression to get around this issue.

我们必须将以下内容添加到 <system.webServer>:

We had to add the following to <system.webServer>:

<serverRuntime enabled="true"  frequentHitThreshold="1"  frequentHitTimePeriod="00:00:20" />

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