Hi, I tested this remark. I used the "Clear Pipes Template" from the Browser examples. This really puts a load on the browser. And the program by dop2000 fixes this. Pay attention to the screenshots.
First: I tried to increase the size of Tilemap, then change it back (without "undo").
Second: I additionally tried to fill Tilemap.
The problem is noticeable even by the size of the "layout" file (and program fix it).
Result: If you accidentally add an extra zero to the size, the project will increase irreversibly (not counting the program). Again... again...