OpenXML性能真的低下吗？

博文NET导出Excel的四种方法及评测 中对比了4个库的导出性能，但对OpenXML的评价并不高，本人觉得不合理，所以我重新测试下性能

基于OpenXML的包装类 ExcelDownWorker

public class ExcelDownWorker
{
    void NewRow();//新行

    void Write(object value);//写入列，从A列开始写

    void Start(Stream stream);//创建开始

    void End();//创建结束
}

执行数据写入，数据是前面测试数据 6W行 10列

static void Excel(List<Temp> lt)
        {
            Console.WriteLine(GC.GetTotalMemory(true));
            var st = new Stopwatch();st.Start();var ew = new ExcelDownWorker();
            using (var fs = new FileStream(Directory.GetCurrentDirectory() + "\data.xlsx", FileMode.Create, FileAccess.ReadWrite))
            {
                ew.Start(fs);
                var ps = typeof(Temp).GetProperties();
                foreach (var p in ps) { ew.Write(p.Name); }
                ew.NewRow();
                for (var i = 0; i < 1; i++)//用于测试12W,18W，102W
                {
                    foreach (var n in lt)
                    {
                        foreach (var p in ps) { ew.Write(p.GetValue(n)); }
                        ew.NewRow();
                    }
                }
                ew.End();
                fs.Flush();
            }
            st.Stop();
            Console.WriteLine(GC.GetTotalMemory(true));
            Console.WriteLine(st.ElapsedMilliseconds);
        }

class Temp
    {
        public int Id { get; set; }
        public int Gender { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public DateTime BirthDate { get; set; }
        public string Company { get; set; }
        public string Phone { get; set; }
        public string Website { get; set; }
        public string SSN { get; set; }
    }

static void Main(string[] args)
        {
            var s = File.ReadAllText(Directory.GetCurrentDirectory() + "\test-data.json");
            var lt = DeserializeObject<List<Temp>>(s);
            for (var i = 0; i < 5; i++)
            {
                Console.WriteLine($"___________________第{i+1}次________________________");
                Excel(lt);
            }
            Console.ReadKey();
        }

结论：OpenXML毕竟是底裤，性能有很好的可塑性。6W行10列 耗时800~1000毫秒。