# Efficient custom broadcasting challenge

**URL:** <https://discourse.julialang.org/t/efficient-custom-broadcasting-challenge/135511>\
**Category:** General Usage\
**Created:** [February 6, 2026, 4:30pm UTC](https://discourse.julialang.org/t/efficient-custom-broadcasting-challenge/135511 "2026-02-06T16:30:24Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mcabbott](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mcabbott/32/6603_2.png) [@mcabbott](https://discourse.julialang.org/u/mcabbott)\
**Post date:** [February 6, 2026, 5:40pm UTC](https://discourse.julialang.org/t/efficient-custom-broadcasting-challenge/135511/2 "2026-02-06T17:40:01Z")

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There’s a system of “broadcast styles” by which the lazy broadcasting remembers what sort of object to materialise at the end. There are [official docs](https://docs.julialang.org/en/v1/manual/interfaces/#man-interfaces-broadcasting-1), perhaps also [this example](https://github.com/invenia/NamedDims.jl/blob/master/src/broadcasting.jl) is useful, and some earlier discourse questions: [here](https://discourse.julialang.org/t/how-to-customize-the-new-broadcasting-infrastructure-in-v0-7/11322/4) and [here](https://discourse.julialang.org/t/fully-lost-with-custom-broadcasting-interface/69140/3).

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