Best method to use LAG - A window function in Scripted calculation View.

Hello Community,

I am struggling with performance issue - with LAG - a window function when used in Scripted calculation view. In my scenario I am having a single column table with 7 columns and 1.5 Million records.

When I run the Calculation view (scripted) then output takes more than 10 seconds.

Please suggest the best possible way to use the LAG function on a single table.

Awaiting response.

Regards

Kumar