How to make DataSpell display the runtime of a cell？

It works for me:

pip install ipython-autotime

Once you have loaded it, any cell run after this ,will give you the execution time of the cell:

%load_ext autotime

Per the VS Code documentation, running an active Jupyter Notebook cell involves the Python: Run Selection/Line in Python Terminal command, or Shift + Enter.

Your line of code from kaggle_house_price_base import train_features, train_labels is a module import statement — see Best practices when importing in IPython and How to correctly import a Python module in VS Code? for additional informaiton.