Power query speed

PaulGotts

New Member
Joined
Nov 5, 2012
Messages
29
Hello All,

I have a question regarding the speed of loading data into Power Query.

Currently, I have a folder containing 10 .CSV files (each ~300MB in size). Loading this entire folder into Power Query is very convenient but after about the 2 millionth row the speed drops to the tune of ~2,000 rows/second and continues to get slower and slower until the files are completely loaded.

Understandably, having ~15 million rows to upload, this ends up taking hours.

Is there a better way to load files into a query, merge, and append them?

I have turned "Load to worksheet" off and am using "Load to data model".
Office 2013, 64-bit, 8GB RAM is the system I'm dealing with.
 

Excel Facts

When did Power Query debut in Excel?
Although it was an add-in in Excel 2010 & Excel 2013, Power Query became a part of Excel in 2016, in Data, Get & Transform Data.

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