[Bug][Grid] large memory when using lots of cells

[zdravkov]

Describe the bug
The memory of the browser us quite large when rendering larger amount of cells

To Reproduce
Here is the setup
https://stackblitz.com/edit/frefyw-wev9gx?file=src%2Fmain.vue

And here is the tested page - https://frefyw-wev9gx.stackblitz.io/
Expected behavior
The memory is extremely high and we need to check if there is a way to decrease it.