bitarray/map over bitarrays/map! for length 255 @test map!(~, b, b1) == map!((x->begin #= /cache/build/tester-amdci4-12/julialang/julia-master/julia-424a5cedf7/share/julia/test/bitarray.jl:1489 =# ~x end), b, b1) == broadcast(~, b1) == b