How to Improve Performance of Running Total DAX Calculation

[MyKr]

Hi PBI Community,

I am building a dashboard where Running Total (based on percentage of emission) need to be shown. This visual would be effected by various filters such as region, country and others.
Following is the measure that works, however the computing time is in excess of 1 minute and unable to compute if the dashboard is published (Visual has exceeded the available resources).

Attached is the sample pbix File. (Data has 59k rows) RunningTotal Power BI File 

Carbon RT % = 
VAR CarbonRT = CALCULATE([Carbon Sum],FILTER(ALLSELECTED(Emission[Building Name]),SUM(Emission[Carbon])<=[Carbon Sum]))
VAR CarbonTotal = CALCULATE(SUM(Emission[Carbon]),ALLSELECTED(Emission[Building Name]))
VAR CarbonPercentage = DIVIDE(CarbonRT,CarbonTotal)
Return CarbonPercentage

Is there any way I can optimise the measure to run faster or other alternative approach?

Of course limiting the table visual does help in performance, however the requirement is to display the overall table.

Appreciate your input.

[MyKr]

Hi @Jihwan_Kim , brilliant, your solutions works well and significantly reduced the calculation time! thank you.

@ppm1  thanks for the support. Yes, it is alot of data! but unfortunately that is the requirement to facilitate discussion. Will surely keep the limit in mind.

[ppm1]

Nice improvement, @Jihwan_Kim . I wrote almost the same measure before I saw your response. @MyKr note that while improving the DAX is great, the real issue on performance is that you have a visual that has >11K rows. If you are creating a visual for people to export data, that's one thing. Otherwise, you may want to consider a report design that limits the # of rows in the table at any given time.

Pat

[Jihwan_Kim · Accepted solution]

Hi,

Please try something like below.

I don't think it improved extremely, but it did improve a little.

Please check if it suits your requirement.

Running total % =
VAR _carbontotal =
    CALCULATE ( [Carbon Sum], ALLSELECTED ( Emission[Building Name] ) )
VAR _newtable =
    ADDCOLUMNS (
        ALLSELECTED ( Emission[Building Name] ),
        "@carbonsum", [Carbon Sum]
    )
VAR _cumulatetable =
    ADDCOLUMNS (
        _newtable,
        "@cumulatesum",
            SUMX (
                FILTER ( _newtable, [@carbonsum] >= EARLIER ( [@carbonsum] ) ),
                [@carbonsum]
            ),
        "@total", _carbontotal
    )
RETURN
    MAXX (
        FILTER (
            ADDCOLUMNS ( _cumulatetable, "@result", DIVIDE ( [@cumulatesum], [@total] ) ),
            Emission[Building Name] = MAX ( Emission[Building Name] )
        ),
        [@result]
    )