Calculate day difference of next departure date for 8 million rows of data , out of memory error

[Pandadev]

Hi I am trying to calculate based on ID code and departure date , the length of time between the next previous departure date , so I can filter only those that are greater than or equal to 7 days.

I have tried these formulas , but i just get an out of memory error. Is there a more efficient way of doing this please.

PreviousDateCalculation = CALCULATE(max('TU Feed'[departure]),FILTER('TU Feed','TU Feed'[ID]=EARLIER('TU Feed'[ID])&&'TU Feed'[departure]<EARLIER('TU Feed'[departure])))
DateDiffCalculation = DATEDIFF('TU Feed'[PreviousDateCalculation],'TU Feed'[departure],DAY)

[V-lianl-msft]

Hi @Pandadev  ,

For information on how to optimize DAX and report performance, please refer to

https://www.sqlbi.com/articles/capturing-power-bi-queries-using-dax-studio/ 

https://docs.microsoft.com/en-us/power-bi/guidance/power-bi-optimization 

https://maqsoftware.com/expertise/powerbi/dax-best-practices 

Best Regards,
Liang
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