# \#streams

**URL:** https://racket.discourse.group/tag/streams/229.md

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## [Basic Scheme stream question](https://racket.discourse.group/t/basic-scheme-stream-question/3439)

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**Author:** [@AlexG](https://racket.discourse.group/u/AlexG)\
**Replies:** 7\
**Last updated:** [December 24, 2024, 11:27am UTC](https://racket.discourse.group/t/basic-scheme-stream-question/3439 "2024-12-24T11:27:33Z")

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I wonder if any Scheme-whizz can help out with this basically noob question. Implementing the Catalan numbers using streams, why is the 2nd solution so much faster (factor of ~4) than the 1st and the 3rd? Technically t…