java - 在 Java 中使用 superfasthash

Question

我正在测试 superfasthash 和 Java 中使用的默认散列算法之间的速度比较。

但我不确定我是否正确使用了 superfasthash 算法，因为我真的找不到任何关于参数含义的文档。

我在这里得到了算法的 java impl 。

这是我的代码：

public class Main
{

   static List<String> dataArray = new ArrayList<>();

   public static void main(String[] args) throws IOException
   {

      writeToArray();
      System.out.println("Finished writing to the array.");

      //hashing using default java
      long startTime = System.nanoTime();
      dataArray.stream()
               .forEach(s -> s.hashCode());
      long endTime = System.nanoTime();
      long duration = (endTime - startTime);  //divide by 1000000 to get milliseconds.
      System.out.println("Finished hashing the file using default java (nanoseconds): " + duration );

      //hashing using superfasthash algo
      startTime = System.nanoTime();
      dataArray.stream()
               .forEach(s -> {
                  SuperFastHash.calculate(s.getBytes(), 1, 1, 1);
               });
      endTime = System.nanoTime();
      duration = (endTime - startTime);  //divide by 1000000 to get milliseconds.
      System.out.println("Finished hashing superfasthash algo (nanoseconds): " + duration );
   }

   private static void writeToArray()
   {
      String abc = "abcdefghijklmnopqrstuvwxyz";
      String toHash;
      Random r = new Random();
      for (int i = 0; i <= 1000000; i++)
      {
         toHash = "";

         for (int ii = 0; ii < 10; ii++)
         {
            int low = 0;
            int high = 26;
            int result = r.nextInt(high - low) + low;
            toHash = toHash + abc.charAt(result);
         }

         dataArray.add(toHash);
         System.out.println("Writing index = " + i + ". String: " + toHash);
      }
   }
}

但不确定在使用 SuperFastHash 类中的计算函数时在参数中写什么。

标签： javahashhashmap