In RTL, Swing application performs much slower with Hebrew text

FULL PRODUCT VERSION :
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) Client VM (build 24.51-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Performance of FontMetrics calculation is very slow if in the text at least one letter is Hebrew

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached sample code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Performs much slower with Hebrew text.
ACTUAL -
Performance should be same as with English text.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.image.BufferedImage;

public class TestHebrewPerformance
{

 public static void main( String args[] ) {
  String hebrew= "הָאָֽרֶץ׃ בְּרֵאשִׁ֖יאֱלֹהִ֑ת הַשָּׁמַ֖יִם וְאֵ֥ת הָאָֽ";
  //String hebrew= "abcde()agjkljkjelwkהָ";
  String english="abcde()agjklj;lkjelwk";
  FontMetrics fm=createFontMetrics(new Font("dialog",Font.PLAIN,12));
  int size=50000;
  long start=System.currentTimeMillis();
  for(int i=0;i<size;i++)
  {
   fm.stringWidth(hebrew);
  }
  System.out.println("Calculation time for hebrew: "+(System.currentTimeMillis()-start)+" ms");
  start=System.currentTimeMillis();
  for(int i=0;i<size;i++)
  {
   fm.stringWidth(english);
  }
  System.out.println("Calculation time for english: "+(System.currentTimeMillis()-start)+" ms");
 }
 private static FontMetrics createFontMetrics(Font font)
 {
  BufferedImage bi = new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB_PRE);
  Graphics g = bi.getGraphics();
  FontMetrics fm = g.getFontMetrics(font);
  g.dispose();
  bi = null;
  return fm;
 }
}

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