Performance-HTML is a free Chrome extension developed by Daniel Lucks. It falls under the category of Browsers and is listed as an Add-ons & Tools subcategory. This extension is designed to provide users with technical and structural performance data of websites.

With Performance-HTML, analyzing the performance of a website becomes quick and easy. Simply open the website you want to inspect, click on the extension's icon in the browser bar, and a popup will appear. This popup displays various performance data that can be incredibly useful for website analysis.

The extension presents performance metrics such as DNS Lookup Time, Network Connection Time, Time to First Byte, Document Ready, and Document Complete. It also provides information about the website's DOM, including the number of external files (Javascript, CSS) and the number of DOM elements. Additionally, there is a panel dedicated to showcasing the memory usage of Javascript execution.

Performance-HTML offers users the opportunity to gain a quick overview of a website's performance and compare it with other sites. This can be particularly valuable for web developers and performance analysts.

Please note that the developer, Daniel Lucks, welcomes feedback and ideas for additional information to incorporate into the popup. However, it is important to avoid including personal contact information or suggesting direct contact with the developer in the review.