# Performance drawback with subtyping

**URL:** <https://discourse.julialang.org/t/performance-drawback-with-subtyping/51939>\
**Category:** Performance\
**Created:** [December 16, 2020, 4:02pm UTC](https://discourse.julialang.org/t/performance-drawback-with-subtyping/51939 "2020-12-16T16:02:42Z")\
**Posts on this page:** 1\
**Showing post:** 31

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**Author:** ![paulmelis](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/paulmelis/32/35063_2.png) [@paulmelis](https://discourse.julialang.org/u/paulmelis)\
**Post date:** [May 24, 2021, 4:16pm UTC](https://discourse.julialang.org/t/performance-drawback-with-subtyping/51939/31 "2021-05-24T16:16:31Z")

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As far as I can see your additions and fixes to the C++ code are fine.

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_[View the full topic](https://discourse.julialang.org/t/performance-drawback-with-subtyping/51939)._