I have several hundrends of work item that i want to generate a lop network through a python script node in TOP.
in order to make this process faster, i was thinking if its possible to separate these work items into many smaller chunks so that each chunk could be processed by a python node. but i am not sure why it's not working for me. or is there any way i could split this big job into smaller one using some other ways?

If you are talking about using Python Script TOP in-process to generate LOP nodes within the same session then I'm not sure you can make it faster that way

While I don't know exactly how the execution works in that case, I'd assume that they all would flood commands to the same in-process shell therefore at best resulting in the same execution speed and at worst in a complete mess as they may be trying to send commands over each other, but thats just my guess as I tend to avoid any sort of Python Script nodes (whether TOP, SOP, ...) to modify the current session's scene graph itself