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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		ByteArrayOutputStream os = new ByteArrayOutputStream();
  13. 		ArrayList<byte[]> buffer = new ArrayList<>(770000);
  14. 		for(int i = 0; i < 770000; ++i)
  15. 		{
  16. 			buffer.add("0000000000000000000000000000000000000000".getBytes());
  17. 		}
  18.  
  19. 		final long begin = System.nanoTime();
  20. 		write(os, buffer);
  21.  
  22. 		try (OutputStream outputStream = new FileOutputStream("/tmp/bytes.txt")) {
  23. 	                outputStream.write(os.toByteArray());
  24. 	                outputStream.flush();
  25. 	            }
  26.  
  27.                         final long end = System.nanoTime();
  28. 	            System.out.println((end - begin) / 10000000.0 + "ms");
  29. 	}
  30.  
  31. 	public static void write(OutputStream out, ArrayList<byte[]> buffer) throws IOException {
  32. 	        for (byte[] packet: buffer) {
  33. 	            out.write(packet);
  34. 	        }
  35. 	    }
  36. }
Success #stdin #stdout 0.36s 201100KB
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Standard input is empty
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29.7353156ms
https://ideone.com/M8sZhw
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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