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Ran 30 Aug 2024 10:32AM UTC

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Committed 30 Aug 2024 03:15AM UTC coverage: 87.882% (+0.007%) from 87.875%

Job # #37888.1

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Commit Message

Specialize newindex for StructuredMatrix broadcasting (#55626)

This provides most of the benefits seen in
https://github.com/JuliaLang/julia/pull/55604. The simpler
implementation appears to help with branch-prediction in inferring the
zero elements of the structured matrices.
The improved performance as a consequence:
```julia
julia> using LinearAlgebra

julia> U = UpperTriangular(rand(3000,3000)); D = Diagonal(rand(size(U,1)));

julia> @btime $U .+ $D;
  23.405 ms (3 allocations: 68.66 MiB) # nightly
  15.266 ms (3 allocations: 68.66 MiB) # This PR
```

---------

Co-authored-by: Matt Bauman <mbauman@juliahub.com>

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