Mapping or joining which one is better?

[FFBB1983]

Hi Community, as the subject, I have two ways to add an extra column to the primary table. I am wondering which one is better from the perspective of processing time. I would like to do it in the most optimized way.

[Frank_Hartmann · Accepted solution]

this might be what you are looking for:

https://community.qlik.com/t5/Qlik-Design-Blog/Don-t-join-use-Applymap-instead/ba-p/1467592