{$ERROR Do not use, untested/WIP/useless!}
{$ifdef __HEAD}
TProfileBinary = class(TProfileDataFile)
private type
 TEnterRec = packed record
   Thread: TThreadID;
   When: Int64;
   Line: Integer;
   Func, Src: ShortString;
 end;
 TLeaveRec = packed record
   Thread: TThreadID;
   When: Int64;
 end;
private
  fDF: TMemoryStream;
public
  constructor Create(const aFileName: string);
  destructor Destroy; override;
  procedure WriteEnter(Thread: TThreadID; When: Int64; Func, Src: String; Line: Integer); override;
  procedure WriteLeave(Thread: TThreadID; When: Int64); override;
end;

{$ELSE}

{ TProfileBinary }

constructor TProfileBinary.Create(const aFileName: string);
begin
  inherited;
  fDF:= TMemoryStream.Create;
  fDF.SetSize(50000000);
end;

destructor TProfileBinary.Destroy;
begin
  FreeAndNil(fDF);
  inherited;
end;

procedure TProfileBinary.WriteEnter(Thread: TThreadID; When: Int64; Func, Src: String; Line: Integer);
var
  t: TEnterRec;
begin
  t.When:= When;
  t.Thread:= Thread;
  t.Func:= Func;
  t.Src:= Src;
  t.Line:= Line;
  fDF.Write(t, sizeof(t));
end;

procedure TProfileBinary.WriteLeave(Thread: TThreadID; When: Int64);
var
  t: TLeaveRec;
begin
  t.When:= When;
  t.Thread:= Thread;
  fDF.Write(t, sizeof(t));
end;
{$ENDIF}