PowerBI Rankx very slow

[schaetzles]

Hey guys,
I have performance issues with the Rankx function.

Currently, i use the rankx function for a dynamic top n selection for a matrix with a slicer.

This works fine for a table with less than 200 customers.
However, if i use my table with 15000 customers, the matrix will not load.

I would be really glad for suggestions or workarounds.

The DAX for my rankx function is the following:

Rank__Customer = RANKX(ALL(Customer[CustomerName] ),[TotalSales])

[v-jayw-msft · Accepted solution]

Hi @schaetzles ,

If the customer table only has the customername column.

new table = distinct(cusotmer[customername ])

If not, it is recommended to create a new table with only customername column, then link the new table with the customer table, and replace the customer table in your formula with the new table.

Rank__Customer = RANKX(ALL(new table[CustomerName] ),[TotalSales])

Best Regards,

Jay

[amitchandak]

@schaetzles , if you are doing dynamic TOPN, then use TOPN

https://community.powerbi.com/t5/Community-Blog/Dynamic-TopN-made-easy-with-What-If-Parameter/ba-p/3...

TOPN: https://youtu.be/QIVEFp-QiOk

Also, is total sales is a simple measure?

[schaetzles]

Thanks for the answer! 
Total Sales is just a simple measure.