| ⇢ | A | CrawlerRestart added | |
| ⇢ | A | CrawlerContinue added |
| ⇢ | B | CrawlerContinue::loadFromPreviousCrawl() added | |
| ⇢ | A | CrawlerContinue::__construct() added | |
| ⇢ | A | Crawler::getId() added | |
| ⇢ | A | Crawler::setBaseAndReturnNormalizedStartUrl() added | |
| ⇢ | A | CrawlerRestart::__construct() added | |
| ⇢ | A | CrawlerRestart::loadFromPreviousCrawl() added | |
| B | ↘ | C | Crawler::crawl() got worse |
| A | ↛ | Crawler::setWaitBetweenRequest() removed |