User`s guide

Working with Codistributed Arrays
5-19
The following points are worth noting:
• '2dbc' distribution might not offer any performance enhancement unless the block
size is at least a few dozen. The default block size is 64.
• The lab grid should be as close to a square as possible.
• Not all functions that are enhanced to work on '1d' codistributed arrays work on
'2dbc' codistributed arrays.