private static Double round(Double value,int count)
	{
		Double scale=Math.pow(10.0,count);
             //return (double) Math.signum(value)*Math.round(Math.abs(                             value)*scale  )/scale; - нормально работает
		return (double) Math.signum(value)*Math.round(Math.abs((float) (value.floatValue()*scale)))/scale; - здесь снижение скорости
	}

public class Example {

	public static void main(String[] args) 
	{
      double d = (8493.00 - 1000.00)*0.145;
      System.out.println(round1(d,2));		  
		
	}
	
	private static Double round1(Double value,int count)
	{
		//int scale=(int) Math.pow(10,count);
		double scale=Math.pow(10.0,count);
		//float f = (float) (value.floatValue()*scale);
		//return (double) Math.round(f)/scale;
		float f = (float) (value.floatValue()*scale);
		//return (double) Math.round(f)/scale;
        double g = (double) Math.signum(value)*Math.round(Math.abs(                     value)*scale  )/scale;
        System.out.println(g);		  
        //return (double) Math.signum(value)*Math.round(Math.abs(                     value)*scale  )/scale;
		return (double) Math.signum(value)*Math.round(Math.abs(f))/scale;
		//return (double) Math.signum(value)*Math.round(Math.abs((float) (value.floatValue()*scale)))/scale;
	}
}