OpenGL version of Qt makes animated QtQuick2 application excessive cpu load

Anyone has the same issue with me? Or am I missing something?

When using OpenGL version of Qt(not ANGLE version), as long as the application has constant animations or particle systems, it uses 25% cpu on my machine. (one core)

Both Windows XP and Windows 7 has this problem.

tested Qt versions:

1. 5.1.0 alpha, built with -opengl desktop
2. a dev branch checked out at March 23th, built with -opengl desktop
3. 5.0.2 (downloaded at 2013-03-21-461, from http://download.qt-project.org/snapshots/qt/5.0/5.0.2/ , but it’s not there now) opengl version

A simple animation with ‘loops: Animation.Infinite’ reproduces the issue. (quite some examples reproduce the issue)

When I use ANGLE version of Qt (5.0.1), the simple animation uses cpu 0%.