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I have query that pulls data from an Excel sheet and transforms to grab a few columns and a max of 2 rows (email and street address).  Then I converted this process to a custom function.  I then created a new query to run this function on almost every sheet in the Excel file (around 300). The query runs and is slower than I would think it should be. However that is not the issue. The odd thing is I then built a  new query that references (uses the first query as a source) and does some minor changes to the output.  Then I did another referencing the new query. 

So each query builds off the first.

Original query on 300 sheets <- new query for minor cleanup <- new query with extra column <- 3 new query that each only show a subset and trans form

I could see my first query being slow but the other queries are built off next so I am confused. In watching them load in the Queries and Connections box (Excel) it is almost like each query is reloading/transforming what the previous query did.

In searching and reading I could not find much that seemed to help. I played some with the queries but nothing helped. I did try using Table.Buffer

    BufferedSource = Table.Buffer(Source)

That did not seem to work. I even read that putting it in the wrong query can hurt not help. So even played with moving it from the first to the 2^nd query. Still no luck.

Anyone have any thoughts or ideas?

Thanks

Alan