Power Query, Power BI And The “Allow Data Preview To Download In The Background” Option

Recently I was asked by a customer to do some tuning on an Excel workbook with a lot of Power Query queries in it. Although all of the data used in the queries was coming from tables in the workbook itself and the data volumes were small, there were fifty Power Query queries and clicking Refresh All resulted in a large, prolonged spike in CPU and memory usage by Excel.

Bron : Chris Webb’s BI Blog
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