That's clutching at straws tbh. I have a "native" google docs spreadsheet that has atm 4 sheets, all at 50 lines or less. No fancy formulas except sums. It just tracks hours for billing.
It uses 500 Mb of ram fresh, and in a couple weeks it goes up to 1.5 to 2 Gb and I have to kill the tab and reopen it.
This is the modern javascript world...