Why does the order of the loops affect performance when iterating over a 2D array?

Why does the order of the loops affect performance when iterating over a 2D array?

c performance for-loop optimization cpu-cache

c

Which ordering of nested loops for iterating over a 2D array is more efficient [duplicate]

c performance for-loop cpu-cache

c

How can I do a CPU cache flush in x86 Windows?

c windows x86 cpu cpu-cache

c

Design code to fit in CPU Cache?

c performance caching cpu-architecture cpu-cache

c