Since the development process XPCCor takes quite a long time and full processor resources, it makes the main process DxO PhotoLab quite unresponsive. It is impossible to continue editing images, while developing.
Please provide the necessary functionality to prioritize DxO Photolab, so that it stays responsive while developing. One idea to achieve this might be to set low process priority for XPCCor processes?
DPL can be set to process images in parallel. You can set this in the rightmost tab of the settings.
Reduce the number of images processed in parallel and you should get back some power for customizing.
Alternatively, you could process your images once they are all customized.