bitarray/map over bitarrays/map! for length 6400 @test map!(<, b, b1, b2) == map!(((x, y)->begin #= /cache/build/tester-amdci4-12/julialang/julia-master/julia-79b39a5eda/share/julia/test/bitarray.jl:1505 =# x < y end), b, b1, b2) == (b1 .< b2) == b