[pull] master from JuliaLang:master #2105
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`map` is a simpler operation and uses linear indexing for `Array`s. This often improves performance (occasionally enabling vectorization) and improves TTFX in common cases. It also automatically returns the correct result for 0-D arrays, unlike broadcasting that returns a scalar. Performance: ```julia julia> A = ones(3,3); julia> @Btime $A + $A; 44.622 ns (2 allocations: 144 bytes) # v"1.13.0-DEV.1387" 29.047 ns (2 allocations: 144 bytes) # this PR julia> A = ones(3,3000); julia> @Btime $A + $A; 10.095 μs (3 allocations: 70.40 KiB) # v"1.13.0-DEV.1387" 4.787 μs (3 allocations: 70.40 KiB) # this PR julia> @Btime A + B + C + D + E + F setup=(A = rand(200,200); B = rand(200,200); C = rand(200,200); D = rand(200,200); E = rand(200,200); F = rand(200,200)); 93.910 μs (3 allocations: 312.59 KiB) # v"1.13.0-DEV.1387" 64.813 μs (9 allocations: 312.77 KiB) # this PR ``` Similarly for `-`. TTFX: ```julia julia> A = ones(3,3); julia> @time A + A; 0.174090 seconds (303.47 k allocations: 14.575 MiB, 99.98% compilation time) # v"1.13.0-DEV.1387" 0.072748 seconds (220.27 k allocations: 11.139 MiB, 99.95% compilation time) # this PR ``` These are measured on ```julia julia> versioninfo() Julia Version 1.13.0-DEV.1388 Commit c5f4927 (2025-10-27 11:44 UTC) Platform Info: OS: Linux (x86_64-linux-gnu) CPU: 8 × Intel(R) Core(TM) i5-10310U CPU @ 1.70GHz WORD_SIZE: 64 LLVM: libLLVM-20.1.8 (ORCJIT, skylake) GC: Built with stock GC Threads: 1 default, 1 interactive, 1 GC (on 8 virtual cores) Environment: LD_LIBRARY_PATH = /usr/local/lib: JULIA_EDITOR = subl ```
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