WHY is IIS 3-4X FASTER than Domino with HTTP transfers?

HCL Domino Domino Forum
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Using identical servers attached to the same internet connection. ~100MB test file in the html directory of the domino server and in the inetpub\wwwroot of the IIS 6 server.

Transfer from the Domino box is about 50-60kbps/second. Makes no difference if Domino 6 or 7.

Domino from IIS is about 160-170kbps/second.

Starting additional downloads impact the Domino box greatly but hardly at all on the IIS box (we’re talking about 3-4 downloads of the same file at the same time).

Either we are missing some tuning params in Domino, or its HTTP task is a dog compared to IIS.

But we love our Domino application development.

Thoughts?

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Subject: WHY is IIS 3-4X FASTER than Domino with HTTP transfers?

Just to doublecheck, I installed domino 7 on the same box, stopped IIS and tested the download and vice versa with IIS6.

Domino is 3-4X slower than IIS in delivering the same file.

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Subject: Have you tried to download uncompressed attachments ?

For one, Domino won’t byte-serve unless the attachments are uncompressed. Perhaps the speed goes up to ?!?

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Subject: RE: Have you tried to download uncompressed attachments ?

Byteserving works well… I was interested in this case in raw http download speed… to see how long it takes to download a 100MB file as a test.

IIS is several times faster - so much faster that it seems something is wrong with the Domino HTTP task.