Why does a css file embedded in a DLL take 50.9ms to 9.4s to load?

Question

Hi all;

I have a Blazor server app running on Azure app server. I am using Application Insights to measure performance and as I am new to Application Insights, this may be a user error.

I have MudBlazor referenced in App.razor as:

<link href="_content/MudBlazor/MudBlazor.min.css" rel="stylesheet" />

I believe this means it is reading it out of the MudBlazor.dll which is a local disk read from a local file.

Application Insights shows the time for 'GET /_content/MudBlazor/MudBlazor.min.css` to be, in order: 9.4s, 1.6s.153.9ms, 50.9ms.

These times are, I believe, the server responding to a client browser that is requesting it. These are all the same browser.

My question is why so long? Even 50.9 strikes me as high for something embedded in a local file. (A separate question is why is the browser re-requesting the file. But that's a distinct issue for another question.)

thanks - dave