Definitely not meant for large datasets. I've tried it with about 100rows and pagination. I would work with react-virtualized for datasets that large

If that is the case, then this would have avoided the real problem that needs solving here. Throwing together some rendering and keyboard handling is not game changing. Getting good performance is the hard problem that needs solving.

Perhaps a future version will focus on making sure it scales?

I might look into it in future revisions as large datasets wasn't part of my initial requirement (having a simple grid component that can handle formulas and copy/pasting).

The best option I had when building this was Handsontable. But that doesn't play nicely with react's virtual dom and immutable data.

It calculates the top level grid component but does not render the cell if it's the same cell object :).