Unnecessary allocation when not unpacking? about componentarrays.jl HOT 2 OPEN

julia> @code_warntype f1!(u)
MethodInstance for f1!(::ComponentVector{Float64})
  from f1!(u) in Main at REPL[9]:1
Arguments
  #self#::Core.Const(f1!)
  u::ComponentVector{Float64, Vector{Float64}, Tuple{Axis{(x = 1:2,)}}}
Body::Nothing
1 ─ %1 = Base.dotgetproperty(u, :x)::Any
│   %2 = Base.broadcasted(Base.identity, 0.0)::Core.Const(Base.Broadcast.Broadcasted(identity, (0.0,)))
│        Base.materialize!(%1, %2)
└──      return Main.nothing


julia> @code_warntype f2!(u)
MethodInstance for f2!(::ComponentVector{Float64})
  from f2!(u) in Main at REPL[10]:1
Arguments
  #self#::Core.Const(f2!)
  u::ComponentVector{Float64, Vector{Float64}, Tuple{Axis{(x = 1:2,)}}}
Locals
  x::SubArray{Float64, 1, Vector{Float64}, Tuple{UnitRange{Int64}}, true}
Body::Nothing
1 ─      (x = Base.getproperty(u, :x))
│   %2 = x::Core.PartialStruct(SubArray{Float64, 1, Vector{Float64}, Tuple{UnitRange{Int64}}, true}, Any[Vector{Float64}, Core.Const((1:2,)), Core.Const(0), Core.Const(1)])
│   %3 = Base.broadcasted(Base.identity, 0.0)::Core.Const(Base.Broadcast.Broadcasted(identity, (0.0,)))
│        Base.materialize!(%2, %3)
└──      return Main.nothing