Are there situations in which we prefer declaring variables as `local` vs `tempvar`?

There's this forum post : https://community.starknet.io/t/when-should-i-use-tempvar-instead-of-local/1668/4 that gives some answers to this question. There's an interesting example where to quote it "replacing locals with tempvars decreases the memory usage by a LOT" Also note that local and tempvar will be removed in Cairo 1.0 : https://medium.com/starkware/cairo-1-0-aa96eefb19a0the memory reduction is 10x when using tempvar instead of local

the memory reduction is 10x when using tempvar instead of local

and also: with alloc_locals; you don't need to use local anymore, just let - my rule of thumb is always use let unless there's a circumstance where I need to use tempvar

This answer was originally posted on StarkNet Discord