This is such that only what's seen or about to be seen is put on the page. The rest is kept ready on the server on local memory depending on what the user is doing.
This allows for a scalable solution that allows you to view thousands of records and interact with them
https://github.com/bvaughn/react-virtualized https://github.com/bvaughn/react-window https://tanstack.com/virtual/latest
1M rows in memory, with pagination or infiniscroll, is interesting only if we load that data and go offline, and all of filtering and sorting is up to the browser. I'd say that it's a niche use case. Furthermore 1M row x 1kB each is 1GB so we enter an order of magnitude ridden with troubles.
This reads like it's a lazy loading library, but then the roadmap has features like
> Assign Items to Users
> Kanban View
> Collaborative Editing
Which read like something you'd have in a project management solution. How do these two concepts form a cohesive product and who is the target audience? I've seen my fair share of Jira and Trello hellscapes, but I doubt Kanban boards with more entries than memory can handle are very common.
I did some quick benchmarks a couple years back. It's been a while but I want to say that Chrome was drawing 10k rows of a decent size each (10 columns of real world data and about 500b/row iirc) in about 300ms on a 10 year old MBP.
I'll do a little benchmarking later today if I get a chance.