# NoStorage¶

class NoStorage

Do not cache self energies.

## Usage Examples¶

Examples on how to use NoStorage() and other storage strategies can be found in the Usage Examples of RecursionSelfEnergy.

## Notes¶

In each step of the SCF loop of a device calculation, the same self energies need to be evaluated.

The NoStorage() storage strategy specifies that each self energy is recalculated in every iteration. This strategy does not require additional memory, but results in poorer performance compared to the StoreOnDisk() and SaveInMemory() strategies.