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Jkaelin's avatar
Jkaelin
Resolver I
9 years ago
Solved

Is this function written poorly?

Good afternoon,   I utilize the following DAX measure often. I am curious if this formula, from the naked eye, looks poorly written (poor performance) or if it looks fine given the information prov...
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v-yulgu-msft's avatar
v-yulgu-msft
Microsoft Employee
9 years ago

Hi Jkaelin,

 

What is your actually problem with above DAX formula? What did you mean "looks poorly written (poor performance)"?

 

For its format, it looks tidy and clear. For its performance, it looks like not a complex logic. Acording to current information, this function look fine. Whether it is the best appropriate method, it depends on your detailed data in actual environment.

 

Here are some articles written about optimizing DAX performance:

Tune your PowerPivot DAX query, don’t use the entire table in a FILTER and replace SUMX if possible

DAX Best Practices

Optimize DAX expressions involving multiple measures

 

Best regards,
Yuliana Gu

  • Jkaelin's avatar
    Jkaelin
    Resolver I
    9 years ago

    v-yulgu-msft

     

    Thank you very much for the response.  I will read those articles.  I appreciate the feedback.  

     

    What did you mean "poor performance"?

    I use this measure in a Power Pivot table for quarterly periods from 2000-2017 (about 60 periods) and the time it takes to calculate is about 20 seconds.  If I use a derivative of that function to generate Stdev & Counts.  It takes a little bit longer.

     

    Thank you,

    James k

    • v-yulgu-msft's avatar
      v-yulgu-msft
      Microsoft Employee
      9 years ago

      Hi Jkaelin,

       

      Sometimes the long response time might also be related to the large amount of data.

       

      Regards,
      Yuliana Gu