Why do functions like similar and copy make 2 allocations for large arrays?

[gdalle]

Which Julia version are you on? The Memory changes of 1.11 are known to cause this behavior

Increase in allocations with Julia v1.11-beta

Is the number of allocations considered an issue? In my small tests here with my packages I’m not seeing performance regressions, but I systematically see the number of allocations increasing, even when compilation is not involved: 1.10.2: julia> using CellListMap julia> x, box = CellListMap.xatomic(10^6); julia> @btime CellList($x, $box) 244.720 ms (13742 allocations: 139.53 MiB) 1.11: julia> using CellListMap julia> x, box = CellListMap.xatomic(10^6); julia> @btime CellList($x, $box)…