Project: VSPEED.DPR

Project Structure

• VSPEED.DPR
• VSPEEDF.PAS
• VSPEEDF.DFM

program vspeed;

uses
  Forms,
  vspeedf in 'vspeedf.pas' {Form1};

{$R *.RES}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.

unit VSpeedF;

interface

uses
  SysUtils, Windows, Messages, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ComCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    ProgressBar1: TProgressBar;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  Total: Variant;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  time1, time2: TDateTime;
  n1, n2: Variant;
begin
  time1 := Now;
  n1 := 0;
  n2 := 0;
  ProgressBar1.Position := 0;
  while n1 < 5000000 do
  begin
    n2 := n2 + n1;
    Inc (n1);
    if (n1 mod 50000) = 0 then
    begin
      ProgressBar1.Position := n1 div 50000;
      Application.ProcessMessages;
    end;
  end;
  // we must use the result
  Total := n2;
  time2 := Now;
  Label1.Caption := FormatDateTime (
    'n:ss', Time2-Time1) + ' seconds';
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  time1, time2: TDateTime;
  n1, n2: Integer;
begin
  time1 := Now;
  n1 := 0;
  n2 := 0;
  ProgressBar1.Position := 0;
  while n1 < 5000000 do
  begin
    n2 := n2 + n1;
    Inc (n1);
    if (n1 mod 50000) = 0 then
    begin
      ProgressBar1.Position := n1 div 50000;
      Application.ProcessMessages;
    end;
  end;
  // we must use the result
  Total := n2;
  time2 := Now;
  Label2.Caption := FormatDateTime (
    'n:ss', Time2-Time1) + ' seconds';
end;

end.

object Form1: TForm1
  Left = 156
  Top = 104
  Width = 319
  Height = 167
  Caption = 'Variants Speed Test'
  Font.Charset = ANSI_CHARSET
  Font.Color = clBlack
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  PixelsPerInch = 96
  TextHeight = 13
  object Label1: TLabel
    Left = 160
    Top = 20
    Width = 32
    Height = 13
    Caption = 'Label1'
  end
  object Label2: TLabel
    Left = 160
    Top = 60
    Width = 32
    Height = 13
    Caption = 'Label2'
  end
  object Button1: TButton
    Left = 56
    Top = 16
    Width = 75
    Height = 25
    Caption = 'Variants'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 56
    Top = 56
    Width = 75
    Height = 25
    Caption = 'Integers'
    TabOrder = 1
    OnClick = Button2Click
  end
  object ProgressBar1: TProgressBar
    Left = 16
    Top = 96
    Width = 281
    Height = 25
    Min = 0
    Max = 100
    TabOrder = 2
  end
end