static修飾子は多用するべきか

public class Test {

	public static String classField = "classField";
	
	public String instanceField = "instanceField";
	
	public static int cCount = 0;
	
	public static int iCount = 0;
	
	public static void test(int n) {
		String variable;
		Test test = new Test();
		variable = Test.classField;
		long l1,l2,l3;
		
		l1 = System.currentTimeMillis();
		for(int i = 0; i < 50000000; i++){
			variable = Test.classField;
		}
		l2 = System.currentTimeMillis();
		for(int i = 0; i < 50000000; i++){
			variable = test.instanceField;
		}
		l3 = System.currentTimeMillis();
		
		System.out.println(n + ":l2 - l1 = " + (l2 - l1));
		System.out.println(n + ":l3 - l2 = " + (l3 - l2));
		if((l2 - l1) > (l3 - l2)){
			cCount++;
		}else if((l2 - l1) < (l3 - l2)){
			iCount++;
		}
	}

	public static void main(String[] args) {
		for(int i = 0; i < 100; i++){
			test(i);
		}
		System.out.println("cCount=" + cCount + ":iCount=" + iCount);
	}
}