I have to store a list of up to 1000 values in the userData of a node.

Do you think should I store each entry individually in the userData, or should I create just one entry with 1000 values separated by comma.

This is what I think:

• Thousand of individually entries: easy to retrieve with userData('myEntry1'), userData('myEntry2').
  But maybe slow and consume more memory?
  
  
• Single dict entry of 1000 comma separated values: to retrieve it I would need to parse it and use csv module in py, but maybe overall more efficient in speed and memory consumption?
  

I've never used the csv module in python