Asynchronous saving

[YakovL]

So curretly saving is done in a synchronous manner: front-end hangs until saving is done. Is it possible to make it asynchronous? Of'course this will also require some changes in the core, like the ones I've described here, but the main question is: is this possible within a FF addon? As far as I understand, Web Workers can't be used to make saving async without changing TF since they won't get access to the TF's API (or how to call it), so something is to be done inside TF..

Since saving is one of the main performance issues of TW (for me at least) it would be very nice to have async saving.