the_sea_jay Posts - Answer Overflow

the_sea_jay

•Created by the_sea_jay on 12/29/2022 in #help

❔ Best way to you Read lot of files?

I need something like a Filestream but where I can change the file thats read but each time I want to read another file I need to create a new FileStream which does extra allocation. See here:

    public void T2()
    {
        var fs = new FileStream(@"./File.txt", FileMode.Open);
        byte[] buffer = new byte[500];

        for (int i = 0; i < fs.Length; i++)
        {
            buffer[i] = (byte)fs.ReadByte();
        }

        // do somthing with bytes in buffer where I get another file location

        // need to do this cause we want another File but
        fs = new FileStream(@"./AnotherFile.txt", FileMode.Open);

        // Do someting with file

        // need to do this cause we want another File but
        fs = new FileStream(@"./YetAnotherFile.txt", FileMode.Open);

        // and so on

        fs.Close();

    }

    public void T2()
    {
        var fs = new FileStream(@"./File.txt", FileMode.Open);
        byte[] buffer = new byte[500];

        for (int i = 0; i < fs.Length; i++)
        {
            buffer[i] = (byte)fs.ReadByte();
        }

        // do somthing with bytes in buffer where I get another file location

        // need to do this cause we want another File but
        fs = new FileStream(@"./AnotherFile.txt", FileMode.Open);

        // Do someting with file

        // need to do this cause we want another File but
        fs = new FileStream(@"./YetAnotherFile.txt", FileMode.Open);

        // and so on

        fs.Close();

    }

Is there a better way which dont generate as much or even better, no(extra) garbage?

13 replies

CC#

•Created by the_sea_jay on 12/16/2022 in #help

❔ Will I get a performance hit if I use the Enum type as a key value for a Dictionary?

See Code below:

public enum Tee1
{
    None
}

public enum Tee2
{
    None
}

class Program
{
    static Dictionary<Enum, string> h = new Dictionary<Enum, string>();
    
    static void Main(string[] args)
    {
        h.Add(Tee1.None, "Tee1 string");
        h.Add(Tee2.None, "Tee2 string");

        System.Console.WriteLine(h[Tee1.None]); // Output : Tee1 string
        System.Console.WriteLine(h[Tee2.None]); // Output : Tee2 string
    }
}

public enum Tee1
{
    None
}

public enum Tee2
{
    None
}

class Program
{
    static Dictionary<Enum, string> h = new Dictionary<Enum, string>();
    
    static void Main(string[] args)
    {
        h.Add(Tee1.None, "Tee1 string");
        h.Add(Tee2.None, "Tee2 string");

        System.Console.WriteLine(h[Tee1.None]); // Output : Tee1 string
        System.Console.WriteLine(h[Tee2.None]); // Output : Tee2 string
    }
}

Does this also create a hashmap? Or does the compiler do something unexpected here which costs performance?

32 replies

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