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program Test;

{$APPTYPE CONSOLE}

uses
  SysUtils,
  Windows,
  Classes,
  Math;
const
  cCount = 10000000; // 10.000.000
  cTestAnz = 20;

var
  Test: Integer;
  MinZeit, MaxZeit, ZeitSum, Zeit, Freq: Int64;
  I: Integer;
  Anz: Integer;
  
function WriteLnTest: Int64;
var
  Start, Ende: Int64;
  F: TextFile;
  I: Integer;
  Text: string;
begin
  QueryPerformanceCounter(Start);
  AssignFile(F, 'C:\Test.dat');
  try
    Rewrite(F);

    for I := 1 to cCount do
    begin
      Text := Format('Wert: %d', [I]);
      WriteLn(F, Text);
      if (I mod 100000) = 0 then
        Write(#13 + Format('Test %2d: ', [Test]) +  FormatFloat('000%', (I / cCount) * 100));
    end;
  finally
    CloseFile(F);
  end;
  QueryPerformanceCounter(Ende);

  Result := (Ende - Start);
end;

function StreamWriteTest: Int64;
var
  Start, Ende: Int64;
  I: Integer;
  Stream: TFileStream;
  Text: string;
begin
  QueryPerformanceCounter(Start);

  Stream := TFileStream.Create('C:\TestSt.dat', fmCreate or fmShareExclusive);
  try
    for I := 1 to cCount do
    begin
      Text := Format('Wert: %d', [I]) + #13#10;
      Stream.WriteBuffer(Text[1], Length(Text));
      if (I mod 100000) = 0 then
        Write(#13 + Format('Test %2d: ', [Test]) +  FormatFloat('000%', (I / cCount) * 100));
    end;
  finally
    Stream.Free;
  end;
  QueryPerformanceCounter(Ende);

  Result := (Ende - Start);
end;

begin
  try
    ZeitSum := 0;
    MinZeit := MaxLongint;
    MaxZeit := 0;
    Anz := 0;

    QueryPerformanceFrequency(Freq);

    WriteLn('WriteLn-Test');
    for I := 1 to cTestAnz do
    begin
      Test := I;
      Zeit := WriteLnTest;
      ZeitSum := ZeitSum + Zeit;
      MinZeit := Min(MinZeit, Zeit);
      MaxZeit := Max(MaxZeit, Zeit);

      WriteLn(#13 + Format('Test %2d: 100%%; Zeit: %g', [Test, Zeit/Freq]));
      Inc(Anz);
    end;
    WriteLn('----------------------------------------------');
    WriteLn(Format('| Min  : %g', [MinZeit/Freq]));
    WriteLn(Format('| Max  : %g', [MaxZeit/Freq]));
    WriteLn(Format('| Avg  : %g', [(ZeitSum/Anz)/Freq]));
    WriteLn('----------------------------------------------');
    WriteLn;

    ZeitSum := 0;
    MinZeit := MaxLongint;
    MaxZeit := 0;
    Anz := 0;

    QueryPerformanceFrequency(Freq);

    WriteLn('StreamWrite-Test');
    for I := 1 to cTestAnz do
    begin
      Test := I;
      Zeit := StreamWriteTest;
      ZeitSum := ZeitSum + Zeit;
      MinZeit := Min(MinZeit, Zeit);
      MaxZeit := Max(MaxZeit, Zeit);

      WriteLn(#13 + Format('Test %2d: 100%%; Zeit: %g', [Test, Zeit/Freq]));
      Inc(Anz);
    end;
    WriteLn('----------------------------------------------');
    WriteLn(Format('| Min  : %g', [MinZeit/Freq]));
    WriteLn(Format('| Max  : %g', [MaxZeit/Freq]));
    WriteLn(Format('| Avg  : %g', [(ZeitSum/Anz)/Freq]));
    WriteLn('----------------------------------------------');
    WriteLn;
    WriteLn('Fertig');
  except
    on E:Exception do
      Writeln(E.Classname, ': ', E.Message);
  end;
  ReadLn;
end;