Which one should your program use?

If your program needs to manipulate or access data often by the byte, data spaces might be the answer. Use a data space if you frequently address data at a byte level, such as you would in a workfile.

If your program can easily handle the data in 4K byte blocks, a hiperspace might give you the best performance. Use a hiperspace if you need a place to store data, but not to manipulate data. A hiperspace has other advantages: