AppInsight is a performance testing tool designed specifically for web developers. It helps developers measure the asset sizes of their web apps, as well as the associated plugins and widgets. This tool is available as a Chrome add-on and is completely free to use.

With AppInsight, developers can easily test their plugins and view a detailed breakdown of all the dependencies. The tool generates a custom report that provides information on the asset sizes of each dependency, as well as the number of calls made. This allows developers to identify any performance bottlenecks and optimize their web apps accordingly.

AppInsight is a valuable tool for developers who want to ensure that their web apps are optimized for performance. It provides detailed insights into asset sizes and dependencies, helping developers make informed decisions to improve the overall performance of their web apps.