I can\'t understand, Why HTML/Web UI response slower than WinForms/WPF/Android View/Native UI?
The Native UI also have styles, elements nesting, events than the CSS, DOM
Only in substandard browsers (this includes all Android browsers, all Mac OS browsers, all Linux browsers, and worst of all every version of Google Chrome). These are badly written, unoptimised browsers with no concern for touchscreen latency, UI responsiveness and smooth scrolling. They lock up and stutter during any kind of CPU activity, disk or network I/O and user input.
Superior browsers such as Internet Explorer 11 or iOS Safari are sometimes even more responsive than unoptimised native apps.
Basically only Windows 8.1 and iOS have responsive browsers. All other browsers are inferior as far as UI responsiveness is concerned. The difference is really huge. IE11 and iOS Safari obliterate other browsers in UI latency and smoothness.