# Type nuance

**URL:** <https://forums.swift.org/t/type-nuance/67933>\
**Category:** Using Swift\
**Created:** [October 18, 2023, 5:42pm UTC](https://forums.swift.org/t/type-nuance/67933 "2023-10-18T17:42:02Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![taylorswift](https://sea2.discourse-cdn.com/swift/user_avatar/forums.swift.org/taylorswift/32/43413_2.png) [@taylorswift](https://forums.swift.org/u/taylorswift)\
**Post date:** [October 18, 2023, 8:30pm UTC](https://forums.swift.org/t/type-nuance/67933/9 "2023-10-18T20:30:56Z")

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> [@itaiferber](#):
>
> there is only a mild performance degradation to using `any`

to go a bit further, i’m actually not aware of _any_ rigorous study into the performance differences between unspecialized `some` and `any`. with each passing day i grow more suspicious that my own personal [aversion](https://forums.swift.org/t/pitch-elide-some-in-swift-6/63737/68) to `any` comes from cargo-culted conclusions drawn from encountering well known performance bottlenecks like `Codable` that happen to use existentials.

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