是否有更快的方式来循环数千个项目？

Say I have a byte array with 100,000 bytes in it. I want to convert each byte into its textual representation of itself. For example:

假设我有一个包含100,000个字节的字节数组。我想将每个字节转换为其自身的文本表示。例如：

byte[] b = new byte[55000];

for(int i = 0; i < b.Length; i++)
{
Console.WriteLine(ConvertToString(b[i]));
}

The above code takes around 35 seconds to complete, is there some way I could cut that down to around 5 seconds?

上面的代码需要大约35秒才能完成，有什么方法可以将其减少到大约5秒钟吗？

3 个解决方案

#1

As mentioned in my comment I would suggest removing the Console.WriteLine() method. I would also suggest that it be avoided in loops. Typically if you want to see what is being processed you would use either the Debug.WriteLine() (MSDN) or set a breakpoint (even a conditional breakpoint if you have a specific case that isn't working right). If you need to return the data then again i would suggest using a string builder:

正如我在评论中提到的，我建议删除Console.WriteLine（）方法。我还建议在循环中避免它。通常，如果要查看正在处理的内容，可以使用Debug.WriteLine（）（MSDN）或设置断点（如果您的特定情况不正常，则甚至是条件断点）。如果您需要再次返回数据，我建议使用字符串生成器：

byte[] b = new byte[55000];
StringBuilder myStringBuilder = new StringBuilder();

for(int i = 0; i < b.Length; i++)
{
    myStringBuilder.AppendLine(ConvertToString(b[i]));
}
Console.Write(myStringBuilder.ToString());

#2

one thing I fond is Write a Parallel.For Loop with might do faster thing than right now..

我喜欢的一件事是写一个Parallel.For循环，可能比现在更快。

    static void Main()
    {
        int[] nums = Enumerable.Range(0, 1000000).ToArray();
        long total = 0;

        // Use type parameter to make subtotal a long, not an int
        Parallel.For<long>(0, nums.Length, () => 0, (j, loop, subtotal) =>
        {
            subtotal += nums[j];
            return subtotal;
        },
            (x) => Interlocked.Add(ref total, x)
        );

        Console.WriteLine("The total is {0}", total);
        Console.WriteLine("Press any key to exit");
        Console.ReadKey();
    }

#3

-1

Profile your code to see what method is taking the most time. Focus your optimization efforts on that method.

描述您的代码，看看哪种方法花费的时间最多。将优化工作集中在该方法上。

#1

byte[] b = new byte[55000];
StringBuilder myStringBuilder = new StringBuilder();

for(int i = 0; i < b.Length; i++)
{
    myStringBuilder.AppendLine(ConvertToString(b[i]));
}
Console.Write(myStringBuilder.ToString());

#2