Performance is one of the things we think we're doing really well with Kendo UI. We're jsPerfing everything we put in Kendo UI to make sure it's as fast as possible.
Ultimately, impact on page performance largely depends on how you use the tools (same goes for .NET). Used correctly, Kendo UI will help you deliver maximum perf for rich UI.
Ultimately, impact on page performance largely depends on how you use the tools (same goes for .NET). Used correctly, Kendo UI will help you deliver maximum perf for rich UI.
Hope that helps.