lazy evaluation

lazy evaluation (plural lazy evaluations)

1. (computing) Any of a variety of computing techniques that delay the computation of expressions until (and unless) the results are needed.
   • [2014, Alejandro Serrano Mena, Beginning Haskell: A Project-Based Approach, Apress, →ISBN, page 5:

     By default, Haskell uses an execution strategy called lazy evaluation. Under laziness, an expression is never evaluated until it is needed for the evaluation of a larger one.]

• eager evaluation
• strict evaluation

• lazy initialisation