I had reported originarily here OpenCPN 2.3.x Much Slower than 1.3.6?
with the 2.3.x series.
I had mentioned it again here OpenCPN Version 2.4 Release Candidate 714
in the RC714 thread.
several different office workstations - big machines, quad core
with lots of GBs of RAM and SSD hard drives, Win7/64 and XP/32. I use CM93v2 charts
of preference, but raster charts
converted to .kap format appeared to have the same issue (I did not test them with 2.5.0 however because the chart directory window is partly broken, it doesn't descend directories any more).
As soon as I enable show chart borders - the purple lines in CM93 - OpenCPN
slows to a crawl. Before 2.5.0, if I enabled quilting the chart borders disappeared and the speed came back. 2.5.0 correctly shows the borders even with quilting enabled and, sad to say, this causes the slowness again. By slowness I mean that I will hit zoom and count to 6 or 7 before OpenCPN
refreshes... not a slight sluggishness.
I just wanted to report that the bug is still there and very much alive - and mind, 1.3.6 did NOT have the same problem.
Small update: with raster charts, the problem is not as bad, possibly because there are significantly fewer outlines?
Cagney: thanks for the reply. As far as I can tell, F9 toggles quilting. The thing is, quilting is not the problem.