This development release of Clutter improve state tracking and short circuiting
The Clutter 1.15.2 development release is now available for download and testing, as announced by the GNOME developers on July 10, 2013.Compared with the stable Clutter 1.14 release, this development version introduces improvements and updates for the Wayland backend, documentation updates by cleaning up the API reference and improving the comments in the inlined example code (the cookbook is also included in the source archive).
Moreover, Clutter 1.15.2 improves short circuiting and state tracking, allowing ClutterActor to track unmapped actors and clones more aggressively, and to reduce the amount of work required when updating the scene graph.
ClutterFlowLayout:snap-to-grid has been added to Clutter 1.15.2, which allows users to ask the layout manager to not align the actors to grid, and installation of conformance tests into well-known locations is now allowed.
Last but not least, the ClutterText::cursor-event has been replaced by ClutterText::cursor-changed, and ClutterGeometry, ClutterActor::realize and ClutterActor::unrealize have been deprecated, along with their virtual functions. For more details, please check the official raw changelog.
Download Clutter 1.15.2 right now from Softpedia. Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.