I am rendering
Scene strip from VSE in OpenGL mode and only 1 of 16 threads (AMD Ryzen 1700) is fully loaded, others are just around 5-10%. Overall CPU usage is about 15-20%.
Firstly I thought low perfomance could be caused by the fact that VSE is not multithreaded. But tested it with Cycles
Scene strip and everything is fine - all threads are busy.
Need to speed up this OpenGL thing somehow, preferably without instancing of Blender app itself.