@HSeagull. That looks like memory stutter, ...whatever that is.
While on the plane I cleaned up computer, updated it, optimized disk, ran System Mechanic
to optimize memory and repair windows, etc.
Started Opencpn with OpenGL=on ChartOutline=off using CM93 charts
First screenshot was near the start.
1. Start: O-Mem=290mb TotMem=68%
2. Pan-Zoom: O-Mem=687mb TotMem=76%
3. Wait: o-Mem=438mb TotMem=74% -Memory down
4. Not Resp: o-Mem=557mb TotMem=77% Closed
5. Start Again: o-mem=289mb totmem=47%
11. o-mem=1580-ocpn-NoToolbar-grey <--totally bogged down, slow
13. Options-Also-Minimized-OpenCPN and something re: Memory use
Somewhere around 13 it got pretty stuck. I was able to move the Toolbar, grey space. Could click on a spot on the toolbar to get the icon underneath to show. Could do this with additional icons. Was able to open Options. Charts were stalled and would not work.
At number "13.Options-Also-Minimized-OpenCPN and something re: Memory use." I shrank OpenCPN because it was stuck anyway with memory issues, and I wanted to see what would happen. At the time the Toolbar was grey with not icons, I could click on the toolbar and get the icon to show and could do that multiple times. The charts would not work nor could I pan. When I shrank or minimized OpenCPN to a partial window, the Opencpn memory use started going Down and it hit 0 quite quickly.
I was not done yet. I maxmized the program again to see if charts would start working, they did not, nor could I pan or zoom. The toolbar was still grey, but I could move it around.
I had to Terminate the Program with TaskManager. Would not close.
After running OpenCPON with Opengl=on and ChartOutline=off (above),
I ran System Mechanic
PC Total Care and it recovered 239mb of fragmented memory.
I had run System Mechanicm prior to doing the test so the memory was completely cleaned then. Have no idea how this impacts Opencpn
The Screenshots 1-21 are uploaded and on
OpenCPN Beta File Thingie
Look under TESTS-opengl-chart-outlines directory please.
You can download them if you want, I did not want to compress them.