| 42 | const int e_count = 40; |
| 43 | |
| 44 | result_t measure(clock_t *times) { |
| 45 | float values[FRAMES]; |
| 46 | result_t r; |
| 47 | |
| 48 | float total = 0; |
| 49 | for (int i = 0; i < FRAMES; ++i) { |
| 50 | values[i] = (float)times[i] / CLOCKS_PER_SEC * 1000; |
| 51 | total += values[i]; |
| 52 | } |
| 53 | r.mean = total / FRAMES; |
| 54 | |
| 55 | float variance = 0; |
| 56 | for (int i = 0; i < FRAMES; ++i) { |
| 57 | float diff = values[i] - r.mean; |
| 58 | variance += diff * diff; |
| 59 | } |
| 60 | r.stddev = sqrt(variance / FRAMES); |
| 61 | |
| 62 | return r; |
| 63 | } |
| 64 | |
| 65 | b2World *world; |
| 66 | clock_t *times, minn = CLOCKS_PER_SEC * 1000 * 100, maxx = -1; |