Making a site faster improves the user's experience while also increasing the crawl rate. For Googlebot, a speedy site is a sign of healthy servers, so it can get more content over the same number of connections. On the flip side, a significant number of 5xx errors or connection timeouts signal the opposite, and crawling slows down. We recommend paying attention to the Crawl Errors report in the Search Console and keeping the number of server errors low.