Apache POI Java Excel Performance for Large Spreadsheets

Question

I have a spreadsheet I\'m trying to read with POI (I have both xls and xlsx formats), but in this case, the problem is with the xls file. My spreadsheet has about 10,000 row

Answer 1

I did also some processing with thousands of large excel files and in my opinion POI is very fast. Loading that excel files tooks also about 1 minute in Excel itself. So i would confirm that the problem lies out of POI code