# Are there idioms in Julia for fast Algebraic Data Types (ADT)?

**URL:** <https://discourse.julialang.org/t/are-there-idioms-in-julia-for-fast-algebraic-data-types-adt/37244>\
**Category:** General Usage\
**Created:** [April 8, 2020, 9:14pm UTC](https://discourse.julialang.org/t/are-there-idioms-in-julia-for-fast-algebraic-data-types-adt/37244 "2020-04-08T21:14:23Z")\
**Posts on this page:** 1\
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**Author:** ![jonathan-laurent](https://avatars.discourse-cdn.com/v4/letter/j/ecae2f/32.png) [@jonathan-laurent](https://discourse.julialang.org/u/jonathan-laurent)\
**Post date:** [April 8, 2020, 10:23pm UTC](https://discourse.julialang.org/t/are-there-idioms-in-julia-for-fast-algebraic-data-types-adt/37244/13 "2020-04-08T22:23:26Z")

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Interesting. This means that abstract storage is not as slow as I would have thought.  
Do you have any idea why this is faster than the version where you add type parameters to `Add` and `Const`?

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