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> The implementation saturates CPU before reaching I/O limits

So, I did look over the code and the thing that I walked away asking was "isn't this sort of the reason why sendfile(2) was developed?"

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Axon generates dynamic multipart responses with boundaries and headers to bundle files specified via query parameters. sendfile handles "serve this specific file" but does not handle "bundle these N files into a multipart response."

For static file serving, sendfile would be the better choice.

Reading the manpage for sendfile leads me to believe that it can be used for that purpose

I might be wrong then! I'll make a note to take a look. Thanks for pointing this out.

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