In article <8e4053d250.martin@xxxxxxxxxxxxxxxxxxx>, Martin Wuerthner <lists@xxxxxxxxxxxxxxx> wrote: > In message <cab463d150.jr@xxxxxxxxxxxxxxxxxxxxx> > rickman@xxxxxxxxxxxxx wrote: > > Martin Avison's Task Usage program shows that ArtWorks uses about > > 15% of the CPU even when it is just sitting on the iconbar with > > no windows open. It is polling the Wimp about 800 times a second. Typically 44% and 7000 WimpPole/sec on RISC OS 5.13. Why this is significantly different to what John has reported is a mystery. > Yes, ArtWorks asks for Null events. Effectively, it only uses any > measurable amount of CPU time if nothing else uses the CPU, so the > 15% figure does not really mean anything. Admittedly, there may be > quite a significant slowdown if you have a large file loaded in > ArtWorks on a system without lazy task swapping enabled. > > The only other program that uses CPU all the time is HID. As it > > is responsible for mouse and keyboard this is not unreasonable. > > What is ArtWorks watching and waiting for? > ArtWorks has various features that require background processing, > e.g., the "Show coordinates" window. There are internal technical > reasons why ArtWorks has to ask for Null events all the time even > if these features are not in use. Various other programs do this > as well, e.g., Impression. I was always curious about this until your explanation, Martin. Richard ------------------------------------------------------------ To change, suspend or cancel your subscription go to //www.freelists.org/list/artworks ------------------------------------------------------------