anchor.diff:  [<EntryPoint>]
   let main argv = 
   
  -    let benchmarkver = "1.0.8"
  +    let benchmarkver = "1.0.9"
   
       printfn "DiffSharp Benchmarks"
   
  
positive.code:             x |> Array.sumBy (fun v -> v * log (v / 2.))
          let fvsD (x:DV) =
              x * (log (x / 2.))
  
          let fvv (x:float[]) =
              [|x |> Array.sumBy (fun v -> v * log (v / 2.))
  
negative.code:               x |> Array.sumBy (fun v -> exp (cos v))|]
          let fvvD (x:DV) =
              toDV [x * log (x / 2.); exp (sin x) |> DV.sum; exp (cos x) |> DV.sum]
          let _, _ =  duration n (fun () -> DiffSharp.AD.Float64.DiffOps.jacobian fvvD xvD)
  
          printb 1 29 "original functions"
          let res_fss,      dur_fss =      duration noriginal (fun () -> fss x)
  