Phil,

There is an obvious need for a non-Windows sieving client and your software fills that role very well. But for Windows I have got many optimisations to come and it is crazy to be this competitive - I have got an easy 10% improvement with a couple of one line changes, but I want to spend some time getting it all sorted and solid and get further improvements rather than rushing out updates in an optimisation battle.
Cheers,

Paul.