The first type: (The simplest nsdate)
NSDate* tmpStartData = [NSDate date];//You code here...double deltaTime = [[NSDate date] timeIntervalSinceDate:tmpStartData];NSLog(@"cost time = %f", deltaTime);
The second type: (Put the running code in the block below, return the time)
#import <mach/mach_time.h> // for mach_absolute_time() and friends CGFloat BNRTimeBlock (void (^block)(void)) { mach_timebase_info_data_t info; if (mach_timebase_info(&info) != KERN_SUCCESS) return -1.0; uint64_t start = mach_absolute_time (); block (); uint64_t end = mach_absolute_time (); uint64_t elapsed = end - start; uint64_t nanos = elapsed * info.numer / info.denom; return (CGFloat)nanos / NSEC_PER_SEC; }
The third type:
/** * 计算脚本时间 * @param $last 最后一次的运行clock * @param $key 标识 * @return 当前clock */double t(double last, char* key){ clock_t now = clock(); printf("time:%fs \t key:%s \n", (last != 0) ? (double)(now - last) / CLOCKS_PER_SEC : 0, key); return now;}double t1 = t(0, "");//do somethingt(t1, "end");
Calculate code run time using Objective-c