for循环的性能问题

大家讨论一下,下面两个的循环那个性能好,是为什么,但JVM运行的结果是第二个性能好,为什么啊?

int k = 0;
long start1 = System.currentTimeMillis();
for (int i = 0; i < 1000; i++) {
for (int j = 0; j < 100000; j++) {
k++;
}
}
long end1 = System.currentTimeMillis();
System.out.println(start1);
System.out.println(end1);
System.out.println("K = " + k);
System.out.println("小循环嵌大循环：" + (end1 - start1));

k = 0;
long start2 = System.currentTimeMillis();
for (int i = 0; i < 100000; i++) {
for (int j = 0; j < 1000; j++) {
k++;
}
}
long end2 = System.currentTimeMillis();

System.out.println(start2);
System.out.println(end2);
System.out.println("K = " + k);
System.out.println("大循环嵌小循环：" + (end2 - start2));