Optimizing callbacks in a SUMX iterator

How to optimize a common issue with SUMX iterators by reducing the number of callbacks in the expression.
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[@user-xf1uh4ro2z]

Thank you. Very informative and interesting.

[@businessinsights_AlexRobe]

Thanks again for a very insightful approach for this ever painful callback topic ! Never questioned the use of variables within the ADDCOLUMNS/SUMMARIZE approach -> one more lesson, that you have to question almost everything when optimizing complex DAX calculations you cannot make simpler -> just try it differently...🙏

[@snipelite94]

I enjoy this channel immensely!
I've only been using Power BI and DAX for a short time, so I'm still in the beginner phase.
Alberto is speaking to the ""advanced"" crowd, but I can follow about 75% of the content at least !

[@pawewrona9749]

Amazing video. As always, top level content. Thank you for very clear explanation.

[@nikakalichava8012]

Thank you!

[@Bharath_PBI]

Thank you 👍

[@GagandeepSingh-db8eh]

Great Work (Y)

[@mienzillaz]

I wanted to ask this for so long..
What keyboard you have there? 😊

[@SQLBI]

All the answers here: www.sqlbi.com/blog/alberto/2021/02/14/on-my-recording-gear/

[@mienzillaz]

@@SQLBI thank you, that's a really nice workspace.

[@wilsonman8661]

@@SQLBI Alberto, I am inspired most by the last section on the page about your drive for improvement.

[@SageSam]

Hey, great vid as always. what software do you use to present these videos that allows you to zoom in and draw boxes, etc. ?

[@SQLBI]

ZoomIt: learn.microsoft.com/en-us/sysinternals/downloads/zoomit

[@SageSam]

@@SQLBI thank u ❤️

[@eladiobardelli3001]

siempre a sido útil usar addcolumns + summarize con iteradores

[@suseempal5280]

Can we optimise the callback that happens when we are calculating the cumulative total?
I have a lot of values for which cumulative sum needs to be calculated.