It was not the place neither the object of my post, but why not. Not sure it will interest anyone here, but here it is :

    int counter=0;
    int counter2=0;
    regex MyRegex("123456$");
    string ligne;
    ifstream file("10-million-combos.txt" ); 
    if (file.is_open())
    { 
        while (getline(file,line))
        {
            ++counter;
            if(regex_search(line,MyRegex)) {
                ++counter2;
            }
        }
[download]

  RegexObj := TRegExpr.Create;
  RegexObj.Expression := '123456$';
   reset(tfIn);
    while not eof(tfIn) do
    begin
      readln(tfIn, s);
      if RegexObj.Exec(s) then counter2:=counter2+1;
      counter:=counter+1;
    end;
[download]

    $f = [System.IO.File]::OpenText("10-million-combos.txt")
    while (! $f.EndOfStream) {
        $line = $f.ReadLine();
        if ($line -match "123456$" ) { $counter +=1 }
        $counter2+=1
    }
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    with open("10-million-combos.txt", encoding="cp850") as infile:
        for line in infile:
            counter2 += 1
            if re.search('123456$', line):
                counter += 1
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    open("10-million-combos_LF.txt") do |content|
        content.each_line do |line|
            counter=counter+1
            if line.match(/123456$/) 
                counter2 += 1
            end
        end
    end
[download]

    Dim mStreamReader As StreamReader = New StreamReader("10-million-c
+ombos.txt")
    line = mStreamReader.ReadLine()
    Do While (line IsNot Nothing)
        counter += 1
        If Regex.IsMatch(line, "123456$") Then counter2 += 1
        line = mStreamReader.ReadLine()
    Loop
[download]

    Set objTextFile = objFSO.OpenTextFile("10-million-combos.txt", For
+Reading)
    Set objRegEx = CreateObject("VBScript.RegExp")
    objRegEx.Pattern = "123456$"
    Count=0
    Count2=0
    Do Until objTextFile.AtEndOfStream 
        Count2=Count2+1
        strNextLine = objTextFile.ReadLine
        Set colMatches = objRegEx.Execute(strNextLine)
        Count=Count+colMatches.Count
    Loop
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    Regex rgx = new Regex("123456$");
    int counter = 0;
    int counter2 = 0;
    using (StreamReader sr = new StreamReader(@"10-million-combos.txt"
+))
    {
        String line;
        while ((line = sr.ReadLine()) != null)
        {
            ++counter;
            if (rgx.IsMatch(line))
            {
                ++counter2;
            }
        }
    }
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    $counter=0;
    $counter2=0;
    $handle = fopen("10-million-combos.txt", "r");
    while (($line = fgets($handle)) !== false) {
        ++$counter;
        if(preg_match('/123456\R$/',$line))
        {
            ++$counter2;
        }
    }
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    String line;
    Pattern p = Pattern.compile("123456$");
    String fichier ="10-million-combos.txt";
    InputStream ips=new FileInputStream(file); 
    InputStreamReader ipsr=new InputStreamReader(ips);
    BufferedReader br=new BufferedReader(ipsr);
    while ((line=br.readLine())!=null){
        m = p.matcher(line);
        if (m.find()) {count2+=1;}
        count+=1;
    }
[download]