The Handsontable has major performance issue when I don’t provide any height and width.
https://www.useloom.com/share/16e1aa0f39724929b13ccb1226c191e1
It is a part of our good practises to use fixed values for height and width. Especially in your example - it is 1’750’000 cells for the browser to generate + their styling and data is changed via custom renderer.
I have another example with 150x20 cells only and without custom renderer.
Still deliver the same performance.
So this is more like the flickering them loading. We have a list of performance issues here https://github.com/handsontable/handsontable/issues?utf8=✓&q=is%3Aissue+is%3Aclosed+label%3A"Core%3A+performance"+
Please add your comment if you spot something that hasn’t been mentioned yet.