if you're doing numerical analysis, you're doing it offline, not in real-time. And so again, bit-packing doesn't matter. If your space usage grows exponentially

if you're doing numerical analysis, you're doing it offline, not in real-time. And so again, bit-packing doesn't matter. If your space usage grows exponentially, that becomes a problem, but in that case the difference between programming languages is just a multiplier, and is dwarfed by your algorithmic problems.