Your Power BI report could be slow and not functional. Publishing to Power BI may also show you your ugly baby. Patrick has you covered with 5 things to do before publishing to get that cute baby!
Power BI Tips: External tools (@PowerBITips)
Splitting a Power BI (PBIX) File into a Dataset and Lean Report File (@HavensBI)
Consolidating report elements for improved performance (@ChrisHamill17)