Boost库中dynamic_bitset允许的最大大小

Question

I have a use case where I need to create a bit map with size 2^64-1. After some reading and googling over on this topic, i have decided to use dynamic_bitset from the C++ boost library.

Should I be concerned over the large size of bit map ? I would like to get more thoughts on the performance impact for such a huge size on dynamic_bitset. Any other alternatives for dynamic_bitset with respect to this use case ?

Thanks.

Answer 1

Actually, the size of dynamic_bitset is not limited by the library or by the c++ language itself but it is limited by your RAM size. So, 2^64-1 bits is about 2,305,843,009,213,693,952 bytes, or 2,3 million terabytes. I don't think that you have that much memory in your computer.