public void Replace_Bad()
    {
        var segment = Payload.AsMemory();
        var sw      = Stopwatch.StartNew();

        for (var index = 0; index < Count; index++)
        {
            LoopSpan(segment);
        }
        sw.Stop();
        Logger.WriteLine($"Span: {sw.Elapsed}");

        void LoopSpan(ReadOnlyMemory <char> payload)
        {
            Localizers.ForEach(kv =>
            {
                payload = payload.Replace($"@(((MarkupString)Localizer[\"{kv.Key}\"].Value).ToString())".AsSpan(), kv.Value);
                payload = payload.Replace($"@((MarkupString)Localizer[\"{kv.Key}\"].Value)".AsSpan(), kv.Value);
                payload = payload.Replace($"@Localizer[\"{kv.Key}\"]".AsSpan(), kv.Value);
            });
            payload = payload.Replace("@@".AsSpan(), "@");
            payload = payload.Replace("&lt;".AsSpan(), "<");
            payload = payload.Replace("&gt;".AsSpan(), ">");
        }
    }
    public void Replace_Ok()
    {
        var sw = Stopwatch.StartNew();

        for (var index = 0; index < Count; index++)
        {
            Loop(Payload);
        }
        sw.Stop();
        Logger.WriteLine($"String: {sw.Elapsed}");

        void Loop(string payload)
        {
            Localizers.ForEach(kv =>
            {
                payload = payload.Replace($"@(((MarkupString)Localizer[\"{kv.Key}\"].Value).ToString())", kv.Value);
                payload = payload.Replace($"@((MarkupString)Localizer[\"{kv.Key}\"].Value)", kv.Value);
                payload = payload.Replace($"@Localizer[\"{kv.Key}\"]", kv.Value);
            });
            payload = payload.Replace("@@", "@");
            payload = payload.Replace("&lt;", "<");
            payload = payload.Replace("&gt;", ">");
        }
    }