Hi Kazu, I apologize for the confusing terminology. I am not differentiating between sending a static file with sendfile and a streaming response. I am differentiating between 2 different use cases for sending static files (with sendfile). For all of my web applications, I know what all the static files are and they will never change until I deploy another web application. That means I can stat the files once when the application is deployed and keep that information in memory. So I already have the file length information to include in the header, even though I don't do a file stat when the file is requested. wai-app-static and yesod-static supports these techniques. I hope that is clearer. Thanks, Greg
Yes, I know. The former uses ResponseFile and the latter typically uses ResponseBuilder/ResponseEnumerator. I discussed in the context of ResponseFile which uses sendfile.
Sorry but I don't understand what you try to explain here.
--Kazu
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