Large Register File

Cache

Hold local variables for almost all functions. This saves time.

Recently used local variables are fetched from main memory for any further use. Dynamic use optimises memory

The variables are individual.

The transfer from memory is block wise.

Global variables are assigned by the compilers.

It stores recently used variables. It cannot keep track of future use.

Save/restore needed only after the

maximum call nesting is over (that is n -

1 open windows).

Save/restore based on cache replacement algorithms.

It follows faster register addressing.

It is memory addressing.