Piano Roll Performance Issues

[Jonathan Wade]

I'm having some SEVERE UI lag when editing midi in the piano roll. This is about a 25 min project and the midi is being used to automate lights, so there's a lot of data, but when I'm monitoring performance of memory, cpu, gpu, etc. none of them are working very hard, usually below 25%. I've tried editing power settings to set everything to max performance, selected my dedicated GPU for cakewalk instead of integrated graphics, etc. but haven't managed to fix the issue. I also didn't notice any of these issues working with the same project on my other PC. This is a clean Windows 11 install. CPU is an AMD Ryzen 7 4800H, 2900 Mhz, 8 Core(s), 16 Logical Processor(s), GPU is a GTX 1650, ram is 32gb DDR4 3200mhz

[chris.r]

I remember having exactly same problem a few years ago on a 32-bit 2ghz core 2 duo laptop with integrated intel GPU, Win7 and Sonar Platinum. My project was short but there was a massive amount of midi control change data in it, and once it crossed some weight the UI lag started to be apparent to the point I had to wait about 30sek after moving a single event for Sonar to accomplish it, making editing in PRV hopeless. I don't know if both our cases have same root but if yes then it may be hiding there deep for long time.

[Jonathan Wade]

My workaround for now is splitting the songs into individual projects and using a Play List project for the show, but it would be nice to solve the issue still for other projects where that isn't possible