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This patch improves the single core performance of the lattice deform. 1. Prefetching deform vert during initialization. This data is constant for each innerloop. This reduces the complexity of the inner loop what makes more CPU resources free for other optimizations. 2. Prefetching the Lattice instance. It was constant. Although performance wise this isn't noticeable it is always good to free some space in the branch prediction tables. 3. Remove branching in all loops by not exiting when the effect of the loop isn't there. The checks in the inner loops detected if this loop didn't have any effect on the final result and then continue to the next loop. This made the branch prediction unpredictable and a lot of mis predictions were done. For smaller inner loops it is always better to remove unpredictable if statements by using branchless code patterns. 4. Use SSE2 instruction when available. This gives 50% performance increase measured on a Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with GCC 9.3. Also check other compilers. Before: ``` performance_no_dvert_10000 (4 ms) performance_no_dvert_100000 (30 ms) performance_no_dvert_1000000 (268 ms) performance_no_dvert_10000000 (2637 ms) ``` After: ``` performance_no_dvert_10000 (3 ms) performance_no_dvert_100000 (21 ms) performance_no_dvert_1000000 (180 ms) performance_no_dvert_10000000 (1756 ms) ``` Reviewed By: Campbell Barton Differential Revision: https://developer.blender.org/D9087
.. 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 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.