| ⇢ | B | POJ::cacheImage() added | |
| ⇢ | B | POJ::crawler() added | |
| ⇢ | A | HDU::hduSubmit() added | |
| ⇢ | A | HDU::submit() added | |
| ⇢ | A | POJ::judge_level() added | |
| ⇢ | A | POJ::__construct() added | |
| ⇢ | A | HDU::hduLogin() added | |
| ⇢ | A | HDU::__construct() added | |
| ⇢ | A | POJ::find() added | |
| B | ↘ | C | Core::__construct() got worse |
| B | ↘ | C | Crawler::__construct() got worse |