Tor client performance (was Re: URGENT: patch needed ASAP for authority bug)

[Roger Dingledine]

On Sat, Apr 17, 2010 at 02:07:25AM -0400, Roger Dingledine wrote:
> That's because we tried turning on the new EWMA design by Ian Goldberg
> and his grad students at Waterloo, to give higher priority to quieter
> circuits:
> [...]
>     - When choosing which cells to relay first, relays can now favor
>       circuits that have been quiet recently, to provide lower latency
>       for low-volume circuits. By default, relays enable or disable this
>       feature based on a setting in the consensus. You can override
>       this default by using the new "CircuitPriorityHalflife" config
>       option. Design and code by Ian Goldberg, Can Tang, and Chris
>       Alexander.
> I'll try to dig up a more traditional design document for those interested
> in learning more

And here's their tech report:
http://www.cacr.math.uwaterloo.ca/techreports/2010/cacr2010-06.pdf

--Roger