How Effective is cFosSpeed Traffic Shaping?

The effect of cFosSpeed Traffic Shaping was tested on a VDSL-100 connection by measuring pingtimes while an upload or a download, respectively, were running. The average times with and without cFosSpeed were compared and lead to the conclusion that cFosSpeed Traffic Shaping can keep the delay from data transfers 3 to 10 times lower than without.

Traffic Shaping is a technique to reorder Internet data packets in such a way that urgent traffic is transferred first and the rest of the data later. For example, data packets of a VoIP application should be transferred quicker (i.e., with less latency) than packets of an up- or download. Usually, it’s not important if the download is ready 1 second earlier or later, whereas a VoIP connection with a delay of 0.5 seconds is almost unusable.

To that end, cFosSpeed was created. It is a software for the Windows operating system and is in widespread use since 2004. There exist some other programs that have a built-in capability to reduce their data bandwidth so as not to interfere with other applications, but cFosSpeed is the only fully automatic software solution in the market today that can be used for all programs on Windows.

Our report assesses how well cFosSpeed works in today’s Internet with a modern, fast Internet connection. One could think that modern Internet connections with their high bandwidth have made cFosSpeed superfluous. We will show that this is not the case.

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Christoph LuedersHow Effective is cFosSpeed Traffic Shaping?