test iterate large directory

bash test

$ time ls -f -1 | wc -l
  474919

real	0m2.527s
user	0m0.333s
sys	0m0.333s

java output

474917
time: 2758ms

TestIterate.java

package granat.dp.components.image;

import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Iterator;

public class TestIterate {
    public static void main(String[] arg) throws Exception {
        DirectoryStream<Path> paths = Files.newDirectoryStream(Paths.get("/Users/mitallast/Sites/test"));
        Iterator<Path> iterator = paths.iterator();
        int i=0;
        long start = System.currentTimeMillis();
        while (iterator.hasNext()) {
            iterator.next();
            i++;
        }
        long end = System.currentTimeMillis();
        System.out.println(i);
        System.out.println("time: "+(end - start)+ "ms");
    }
}