When plotting a large graph with canvas (150,000 pixel wide), the canvas disapears after about 30,000 pixels and then reappears if you scroll further (potentially repeating itself, though I can't quite tell).
Created attachment 30992 [details] test case Test case with random data.
32-bit overflow?
Sam, do you mean that if one scrolls slowly, after about 30k pixels the canvas won't be drawn for a chunk until you scroll enough and then it all comes in at once as if triggered by going far enough? I've been playing around with the testcase example and can't reproduce on my 15" MBP. Perhaps this is no longer an issue. Could you check on your machine?
ping?
I also cannot reproduce, and given that we haven't received a response since 2010, resolving as WORKSFORME.