The charts uses the same function as test page uses, Still have no solution for the issue. I'm going to rewrite the charts to fix it, at least write a new mobile friendly version. When there is new update I will post it on the threads and it would be thankful if you could help me test the compatible.
Thanks for the quick responses and awesome effort for your site, it really is great to have a dev like yourself.
I think HW accel may be to blame as stated before, but i think it has to do with the chrome 36 update and beyond. Heres some good info on the situation:
https://code.google.com/p/chromium/issues/detail?id=402134. Seems most have AMD hardware (I do myself), but I do not have issues with other sites, and my gfx drivers are all up to date. So there must be some weird combo of chrome/amd/hw accell going on somewhere. If you need anyone to test anything let me know and ill be happy to help
Thank you for the info. I'm using fillRect instead of clearRect to clear the chart in new version. It will redraw every pixel, so it would solve the issue, and fillRect have the same perfomance as clearRect. The difficulty point is avoid charts refresh when moving cursor when both of fillRect and clearRect cannot be used.
About 30% of the new version has been finished.