Re-rendering whole component after each operation. #389

hi Iddan,

I am using this react-spreadsheet component to make it like an excel, but when I try to use the spreadsheet with more than 100 rows and columns it takes time to do the operations, means it get lag it affects the performance of site.

And I think this is happening because of rendering whole spreadsheet after each changes in sheet, I hope you must check this issue and give me a solution for it or give a way by which i can it.

Thank you.