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On Windows/MSVC this gives a minor (~20%) speedup presumably due to a faster float/int formatter. On macOS (Xcode13), this gives a massive speedup, since snprintf that is in system libraries ends up spending almost all the time inside some locale-related mutex lock. The actual exporter code becomes quite a bit smaller too, since it does not have to do any juggling to support std::string arguments, and the buffer handling code is smaller as well. Windows (VS2022 release build, Ryzen 5950X 32 threads) timings: - Blender 3.0 splash scene (2.4GB obj): 4.57s -> 3.86s - Monkey subdivided level 6 (330MB obj): 1.10s -> 0.99s macOS (Xcode 13 release build, Apple M1Max) timings: - Blender 3.0 splash scene (2.4GB obj): 21.03s -> 5.52s - Monkey subdivided level 6 (330MB obj): 3.28s -> 1.20s Linux (ThreadRipper 3960X 48 threads) timings: - Blender 3.0 splash scene (2.4GB obj): 10.10s -> 4.40s - Monkey subdivided level 6 (330MB obj): 2.16s -> 1.37s The produced obj/mtl files are identical to before. Reviewed By: Howard Trickey, Dalai Felinto Differential Revision: https://developer.blender.org/D13998
.. 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.