GTmetrix is a free tool that analyzes a page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for pages and offers actionable recommendations on how to fix them.
- HTTP 요청
Mozilla/5.0 (X11; Linux x86_64; GTmetrix https://gtmetrix.com/) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36
- robots.txt자세히 알아보기
User-Agent: GTmetrix Disallow: /