anchor.diff:                  else None)
       match IO.Path.GetExtension(msg.path).ToLower() with
       | ".fsproj" ->
  -        let isWatchCompile = Map.containsKey msg.path state
  -        createProject checker isWatchCompile None msg msg.path
  +        createProject checker [||] None msg msg.path
           |> addOrUpdateProject state
       | ".fsx" as ext ->
           if Map.containsKey msg.path state then
               // When a script is modified, restart the project with new options
               // (to check for new references, loaded projects, etc.)
  -            createProject checker true None msg msg.path
  +            createProject checker [||] None msg msg.path
               |> addOrUpdateProject state
           else
               match tryFindAndUpdateProject state ext msg.path with
               | Some stateAndProject -> stateAndProject
               | None ->
  -                createProject checker false None msg msg.path
  +                createProject checker [||] None msg msg.path
                   |> addOrUpdateProject state
       | ".fs" as ext ->
           match tryFindAndUpdateProject state ext msg.path with
  
positive.code:     | true, value -> Some value
      | false, _ -> None
  
  let isOptimizeWatch (extraOpts: IDictionary<string, string>) =
      match tryGetOption "optimizeWatch" extraOpts with
      | Some value ->
          match bool.TryParse(value) with
          | true, value -> value
          | false, _ -> false
      | None -> false
  
  let createProject checker isWatchCompile (prevProject: Project option) (msg: Parser.Message) projFile =
      let projectOptions, fableCore =
          match prevProject with
          | Some prevProject ->
              // There seems to be a performance penalty if LoadTime is not updated
              prevProject.ProjectOptions, prevProject.FableCore
          | None ->
              let projectOptions, fableCore =
  
negative.code:             let projFile = Path.normalizeFullPath projFile
              match Map.tryFind projFile state with
              | Some project -> checkWatchCompilation project sourceFile
              | None -> createProject checker [||] None msg projFile
                        |> addOrUpdateProject state |> Some
          | false, _ ->
              state |> Map.tryPick (fun _ (project: Project) ->
  