I have a very large BPM flow that i paint on a dashboard app. as the flow is huge it takes a long time for the picture to be painted. Is it possible to paint partial incrementally at regular intervals or spend up rendering?
How huge is it? May you be able to share an annonymized version of it for test purposes?
For most cases we see our toolkit as fast enough. If you need to optimize the actual rendering as part of a dashboard, consider not using bpmn-js but show a pre-rendered preview instead. bpmn-to-image may be helpful in that regard, as it generates the image by using bpmn-js itself.