LAMBDA Update Suppression (LUS) is an unstable technique that uses LAMBDA to prevent volatile functions from updating.

Syntax

LAMBDA(volatile, update, volatile)([volatile function], [update condition])`

LAMBDA references only recalculate when a change is detected in a cell referenced by the formula. This property overrides the typical volatile property of updating whenever any cell is updated.

Because LUS is unstable, typical use cases relate to temporary randomization and dice rolling.