Memory allocation isn’t that slow (in fact all the ram is SRAM which is typically quite fast), it’s just that you only have 256k-1M RAM in total. This means tha

Memory allocation isn’t that slow (in fact all the ram is SRAM which is typically quite fast), it’s just that you only have 256k-1M RAM in total. This means that any time you’re saving later by trying to fill space now ends up getting wasted when that memory needs to be reclaimed.