[libreoffice-users] calc slowing to a crawl

I have a spreadsheet that is about 500 rows long and about 20 columns 
wide. Column 1 is a date column.
I do not process the date in any cell formulas.  When I hit December, 
about half way through the 500 rows, it tales about 15 seconds to enter 
a number in a blank field.  This is new, as I have been using something 
similar for about  10 years.  Even scrolling without entering data 
causes the sheet to come to a crawl.

Any thoughts?  I noticed today at the bottom of the page, I added some 
lines and it showed the lines being 1024 columns long.  Can this be 
shortened?  Couldn't find anything in options.

Oh yes, xubuntu 15.04, 4 GB RAM, LO version 5.0.4.2

John


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