Hi,
I don’t know why, when I scroll at the start of the table (horizontally), the afterRenderer and afterRender events are fired.
It’s possible to disable this action ?
In my case, my table becomes very slow…
Thank’s for your help.
Romain.
(Sorry for my bad english)
The afterRender and afterRenderer are called for a cell and for the table. Without them you won’t be able to see new cells or the one that aren’t in the viewport.
You can try to change offset settings
https://docs.handsontable.com/pro/5.0.1/Options.html#viewportColumnRenderingOffset
https://docs.handsontable.com/pro/5.0.1/Options.html#viewportRowRenderingOffset
to a number of the columns/rows in your table but then the table will load longer at the initialization.
Thank’s for your response.
I try with big values (500) for column and row offsets, but no changes 
So maybe the project requires some optimization. Can you send over a mockup of your project in a JSFiddle?
After searching, the cause of the problem is not due to the scroll but another script which fired unnecessary HandsOnTable events…
Thank’s for your help !
I am happy to hear that the issue is solved. We can close the topic.