bitarray/map over bitarrays/map! for length 6400 @test map!(<, b, b1, b2) == map!(((x, y)->begin #= C:\buildkite-agent\builds\win2k22-amdci6-3\julialang\julia-master\julia-c89b1ff7a1\share\julia\test\bitarray.jl:1505 =# x < y end), b, b1, b2) == (b1 .< b2) == b