For example, the Geometry Import node is very fast to cook, but what if I want to import height maps as height fields, I have to create an hda to make the import function, then drop down an HDA Processor node in TOP net and cook it. But the HDA Processor node is fairly slow to cook compared to the Built-in Geometry Import node. As far as I understand, the HDA Processor node need to run individual Houdini thread for every workitem in the background, while the Geometry Import node functions like “Evaluating In Process” as how the Python Script node works.
Is there any way to create such lightweight TOP node like the Geometry Import node?