单元测试计算耗时函数

static NSMutableArray* performanceProfiles = nil;
+ (void) performanceProfileStart{
if (performanceProfiles == nil) {
performanceProfiles = [[NSMutableArray alloc] init];
}
[performanceProfiles addObject:[NSDate date]];
}
+ (void) performanceProfileEnd:(NSString *)message{
NSDate* start = [performanceProfiles objectAtIndex: performanceProfiles.count-1];
NSLog(@"[%.3f] %@", -[start timeIntervalSinceNow], message);
[performanceProfiles removeLastObject];
}

  使用

int testTimes = 1000;
[UtilTests performanceProfileStart];
for(int i=0; i<testTimes; i++)[Util func1];
[UtilTests performanceProfileEnd:@"func1 output message"];
[UtilTests performanceProfileStart];
for(int i=0; i<testTimes; i++)[Util func2];
[UtilTests performanceProfileEnd:@"func2 output message"];