Respond to AI review

Author: timholy

src/DiagonalHessianApproximation.jl

@@ -246,3 +246,10 @@ function push!(
   B.d .*= sum(B.d) / sT_y
   return B
 end
+
+for op in (DiagonalPSB, DiagonalAndrei, SpectralGradient, DiagonalBFGS)
+  @eval begin
+    isallocated5(::$op) = true
+    has_args5(::$op) = true
+  end
+end

src/TimedOperators.jl

@@ -26,9 +26,9 @@ Creates a linear operator instrumented with timers from TimerOutputs.
 """
 function TimedLinearOperator(op::AbstractLinearOperator{T}) where {T}
   timer = TimerOutput()
-  prod!(res, x, α, β) = @timeit timer "prod" op.prod!(res, x, α, β)
-  tprod!(res, x, α, β) = @timeit timer "tprod" op.tprod!(res, x, α, β)
-  ctprod!(res, x, α, β) = @timeit timer "ctprod" op.ctprod!(res, x, α, β)
+  prod!(res, x, α, β) = @timeit timer "prod" mul!(res, op, x, α, β)
+  tprod!(res, x, α, β) = @timeit timer "tprod" mul!(res, transpose(op),x, α, β)
+  ctprod!(res, x, α, β) = @timeit timer "ctprod" mul!(res, op', x, α, β)
   TimedLinearOperator{T}(timer, op, prod!, tprod!, ctprod!)
 end
 
@@ -42,7 +42,6 @@ for fn ∈ (
   :issymmetric,
   :ishermitian,
   :has_args5,
-  :use_prod5!,
   :isallocated5,
   :allocate_vectors_args3!,
   :nprod,

src/abstract.jl

@@ -154,10 +154,10 @@ the 5-args `mul!`.
 No additional vectors are generated when using the 3-args `mul!`.
 
 !!! warning
-    `has_nargs5` can be very slow. A better option is to use Julia's `hasmethod`
+    `has_args5` can be very slow. A better option is to use Julia's `hasmethod`
     at points in the code where the concrete types of objects used in `mul!` are known.
 
-    `has_nargs5` may be removed in a future release.
+    `has_args5` may be removed in a future release.
 """
 has_args5(op::AbstractLinearOperator) = get_nargs(op.prod!) == 4