documentation/bookmark/optimization/lazy_evaluation.md


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# Reference

1. [Promises Are Made to Be Broken: Migrating R to Strict Semantics](http://aviral.io/static/pdfs/promises-are-made-to-be-broken.pdf)
1. [Call-by-Need Is Clairvoyant Call-by-Value](http://www.cs.nott.ac.uk/~pszgmh/clairvoyant.pdf)