OC?????????for????е????????
???????????? ???????[ 2015/6/19 14:27:07 ] ??????????????? ???????
?????????????????????????
????@autoreleasepool ????for ??????棬????????????????????????????????????????????????????????????????
?????????????for??????????????????
???????????????????????????????????????????????????????檔
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
NSLog(@"start");
CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();
[self test1];
NSLog(@"?? %f"?? CFAbsoluteTimeGetCurrent() - start);
start = CFAbsoluteTimeGetCurrent();
[self test2];
NSLog(@"?? %f"?? CFAbsoluteTimeGetCurrent() - start);
NSLog(@"over");
}
- (void)test2 {
for (long i = 0; i < largeNumber; ++i) {
@autoreleasepool {
NSString *str = [NSString stringWithFormat:@"hello - %ld"?? i];
str = [str uppercaseString];
str = [str stringByAppendingString:@" - world"];
}
}
}
- (void)test1 {
@autoreleasepool {
for (long i = 0; i < largeNumber; ++i) {
NSString *str = [NSString stringWithFormat:@"hello - %ld"?? i];
str = [str uppercaseString];
str = [str stringByAppendingString:@" - world"];
}
}
}
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11