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Previous code was doing N collection syncs when duplicating N objects. New code avoids all the intermediate syncs by using BKE_layer_collection_resync_forbid and BKE_layer_collection_resync_allow, and then does one BKE_main_collection_sync + BKE_main_collection_sync_remap for the whole operation. There is some complexity involved where the Base things of newly duplicated objects can't be found yet, without the sync, so some work on them (marking them selected, active, ...) has to be deferred until after the sync. Timings: scene with 10k cubes, each with unique mesh (Windows, VS2022 Release build, AMD Ryzen 5950X): - Shift+D duplicate: 13.6s -> 9.2s - Alt+D duplicate: 4.76s -> 1.53s Reviewed By: Bastien Montagne Differential Revision: https://developer.blender.org/D14150
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU General Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.