| 22 |
|
static int nextHead = -1; |
| 23 |
|
static int size() { return nextTail - nextHead - 1; } |
| 24 |
|
|
| 25 |
– |
static int random(int bound) { |
| 26 |
– |
int x = seed; |
| 27 |
– |
int t = (x % 127773) * 16807 - (x / 127773) * 2836; |
| 28 |
– |
seed = (t > 0) ? t : t + 0x7fffffff; |
| 29 |
– |
return (t & 0x7fffffff) % bound; |
| 30 |
– |
} |
| 31 |
– |
|
| 25 |
|
static int random() { |
| 26 |
< |
int x = seed; |
| 27 |
< |
int t = (x % 127773) * 16807 - (x / 127773) * 2836; |
| 28 |
< |
seed = (t > 0) ? t : t + 0x7fffffff; |
| 29 |
< |
return (t & 0x7fffffff); |
| 26 |
> |
int r = seed; |
| 27 |
> |
r ^= r << 13; // xorshift |
| 28 |
> |
r ^= r >>> 17; |
| 29 |
> |
return seed = r ^ (r << 5); |
| 30 |
|
} |
| 31 |
|
|
| 32 |
+ |
static int random(int bound) { |
| 33 |
+ |
return (random() & 0x7fffffff) % bound; |
| 34 |
+ |
} |
| 35 |
+ |
|
| 36 |
|
public static void main(String[] args) throws Exception { |
| 37 |
|
Class<?> cls = Class.forName(args[0]); |
| 38 |
< |
int n = 1000000; |
| 39 |
< |
|
| 43 |
< |
for (int j = 0; j < 3; ++j) { |
| 38 |
> |
long startTime = System.nanoTime(); |
| 39 |
> |
for (int j = 0; j < 200; ++j) { |
| 40 |
|
@SuppressWarnings("unchecked") |
| 41 |
|
Deque<Integer> deque = (Deque<Integer>) cls.newInstance(); |
| 42 |
|
nextTail = 0; |
| 43 |
|
nextHead = -1; |
| 44 |
< |
long start = System.nanoTime(); |
| 49 |
< |
mainTest(deque, n); |
| 50 |
< |
long end = System.nanoTime(); |
| 51 |
< |
long elapsedTimeMillis = (end - start) / (1000L * 1000L); |
| 52 |
< |
System.out.printf("Time: %d ms%n", elapsedTimeMillis); |
| 44 |
> |
mainTest(deque, (random() & ((1 << 20) - 1))); |
| 45 |
|
if (deque.isEmpty()) System.out.print(" "); |
| 46 |
+ |
if ((j % 10) == 9) System.out.print("."); |
| 47 |
|
} |
| 48 |
+ |
long now = System.nanoTime(); |
| 49 |
+ |
long elapsedTimeMillis = (now - startTime) / (1000L * 1000L); |
| 50 |
+ |
System.out.printf("\ntotal time %d ms\n", elapsedTimeMillis); |
| 51 |
+ |
|
| 52 |
|
} |
| 53 |
|
|
| 54 |
|
static void mainTest(Deque<Integer> deque, int n) throws Exception { |
