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# Objective - Supercedes #8872 - Improve sprite rendering performance after the regression in #9236 ## Solution - Use an instance-rate vertex buffer to store per-instance data. - Store color, UV offset and scale, and a transform per instance. - Convert Sprite rect, custom_size, anchor, and flip_x/_y to an affine 3x4 matrix and store the transpose of that in the per-instance data. This is similar to how MeshUniform uses transpose affine matrices. - Use a special index buffer that has batches of 6 indices referencing 4 vertices. The lower 2 bits indicate the x and y of a quad such that the corners are: ``` 10 11 00 01 ``` UVs are implicit but get modified by UV offset and scale The remaining upper bits contain the instance index. ## Benchmarks I will compare versus `main` before #9236 because the results should be as good as or faster than that. Running `bevymark -- 10000 16` on an M1 Max with `main` at `e8b38925` in yellow, this PR in red:  Looking at the median frame times, that's a 37% reduction from before. --- ## Changelog - Changed: Improved sprite rendering performance by leveraging an instance-rate vertex buffer. --------- Co-authored-by: Giacomo Stevanato <giaco.stevanato@gmail.com> |
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| .. | ||
| bevy_a11y | ||
| bevy_animation | ||
| bevy_app | ||
| bevy_asset | ||
| bevy_audio | ||
| bevy_core | ||
| bevy_core_pipeline | ||
| bevy_derive | ||
| bevy_diagnostic | ||
| bevy_dylib | ||
| bevy_dynamic_plugin | ||
| bevy_ecs | ||
| bevy_ecs_compile_fail_tests | ||
| bevy_encase_derive | ||
| bevy_gilrs | ||
| bevy_gizmos | ||
| bevy_gltf | ||
| bevy_hierarchy | ||
| bevy_input | ||
| bevy_internal | ||
| bevy_log | ||
| bevy_macro_utils | ||
| bevy_macros_compile_fail_tests | ||
| bevy_math | ||
| bevy_mikktspace | ||
| bevy_pbr | ||
| bevy_ptr | ||
| bevy_reflect | ||
| bevy_reflect_compile_fail_tests | ||
| bevy_render | ||
| bevy_scene | ||
| bevy_sprite | ||
| bevy_tasks | ||
| bevy_text | ||
| bevy_time | ||
| bevy_transform | ||
| bevy_ui | ||
| bevy_utils | ||
| bevy_window | ||
| bevy_winit | ||