power bi performance issue between sharepoint classic & modern site

[Anonymous]

hi,

i'm currently working on a power bi (pbi) project with a client whose data is stored in a sharepoint site. the pbi solution also uses dataflow + dataset that reside in power bi service (pbis). 

during the proof-of-concept (poc) stage, i successfully tested the solution with the data in the modern sharepoint site. when it came to moving the solution to the production stage, the client decided to transfer all the data to the classic sharepoint site. now, i see some pbi performance degradation (slowness) where the date now resides in the classic sharepoint site. 

may i kindly find out if the use of classic sharepoint site enviroment to store data can contribute to the pbi performance 'problems' (and that i should recommend to the client to consider moving back the data to the modern sharepoint site enviroment)?
tks & krgds, -nik

[V-lianl-msft · Accepted solution]

The SharePoint modern experience client-side processing model can provide dramatic improvement in perceived end user latency over the classic SharePoint architecture. Keep in mind that there may be a greater dependency on the client-side execution environment as compared to the classic SharePoint architecture. As with any change to your network architecture, you should conduct a limited pilot to identify and resolve potential bottlenecks before rolling the SharePoint modern experience into your production environment.

Hope this document will help you:

https://docs.microsoft.com/en-us/sharepoint/modern-experience-performance 

[Anonymous]

Noted yr response with tks, @V-lianl-msft.
KRgds, -nik