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re0312 2893fc3e8b
Using simple approx round up in ui_layout_system (#14079) 
# Objective

- built-in `f32::round `is slow 
- splits from #14064 
## Solution

- using a simple floor instead of round

## Testing

- I am not an expert on floating-point values, but I enumerated all f32
values to test for potential errors compared to the previous function.
[rust
playground](https://play.rust-lang.org/?version=stable&mode=release&edition=2021&gist=0d8ed5604499e7bd9c61ce57d47e8c06)

three cases where the behavior differs between the new and previous
functions:
| value  |  previous | new  |  
|---|---|---|
|  [-0.5,0) |  -0 | +0  |   
|  0.49999997  | 0  |  1 |   
| +-8388609 |  8388609   | 8388610  |   

## Performance


![image](https://github.com/bevyengine/bevy/assets/45868716/1910f342-e55b-4f5c-851c-24a142d5c72e)
2024-07-03 12:48:34 +00:00
..
bevy_a11y Bump accesskit to 0.16 (#14091) 2024-07-01 14:42:40 +00:00
bevy_animation Added get_main_animation for AnimationTransitions (#14104) 2024-07-02 13:28:42 +00:00
bevy_app Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_asset Optimize common usages of AssetReader (#14082) 2024-07-01 19:59:42 +00:00
bevy_audio Optimize common usages of AssetReader (#14082) 2024-07-01 19:59:42 +00:00
bevy_color Allow bevy_color use without bevy_reflect support (#13870) 2024-06-16 15:47:30 +00:00
bevy_core Don't show .to_bits in Display impl for Entity (#14011) 2024-06-25 17:08:24 +00:00
bevy_core_pipeline Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_derive Deprecate dynamic plugins (#13080) 2024-05-20 20:01:28 +00:00
bevy_dev_tools Merge BuildWorldChildren and BuildChildren traits. (#14052) 2024-07-01 14:29:39 +00:00
bevy_diagnostic Poll system information in separate tasks (#13693) 2024-06-10 19:06:22 +00:00
bevy_dylib Add README.md to all crates (#13184) 2024-05-02 18:56:00 +00:00
bevy_dynamic_plugin Deprecate dynamic plugins (#13080) 2024-05-20 20:01:28 +00:00
bevy_ecs use associated type bounds in QueryManyIter and QueryIter::sort() (#14107) 2024-07-02 13:39:22 +00:00
bevy_encase_derive Add README.md to all crates (#13184) 2024-05-02 18:56:00 +00:00
bevy_gilrs Add README.md to all crates (#13184) 2024-05-02 18:56:00 +00:00
bevy_gizmos Use u32 for all resolution/subdivision fields in bevy_gizmos (#13927) 2024-06-19 17:28:10 +00:00
bevy_gltf Added feature switch to default Standard Material's new anisotropy texture to off (#14048) 2024-07-02 18:02:05 +00:00
bevy_hierarchy Fix push_children inserting a Children component even when no children are supplied (#14109) 2024-07-02 13:27:02 +00:00
bevy_input Mouse input accumulation (#14044) 2024-07-01 14:27:21 +00:00
bevy_internal Added feature switch to default Standard Material's new anisotropy texture to off (#14048) 2024-07-02 18:02:05 +00:00
bevy_log Document use of NO_COLOR in LogPlugin (#13984) 2024-06-24 21:04:55 +00:00
bevy_macro_utils Add README.md to all crates (#13184) 2024-05-02 18:56:00 +00:00
bevy_math Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_mikktspace Fixed a link to Blender's mikktspace docs (#13924) 2024-06-19 12:37:10 +00:00
bevy_pbr Added feature switch to default Standard Material's new anisotropy texture to off (#14048) 2024-07-02 18:02:05 +00:00
bevy_picking Upstream CorePlugin from bevy_mod_picking (#13677) 2024-06-15 11:59:57 +00:00
bevy_ptr add Debug for ptr types (#13498) 2024-05-24 21:25:11 +00:00
bevy_reflect Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_render Optimize common usages of AssetReader (#14082) 2024-07-01 19:59:42 +00:00
bevy_scene Optimize common usages of AssetReader (#14082) 2024-07-01 19:59:42 +00:00
bevy_sprite Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_state Move StateTransitionSteps registration to states plugin (#13939) 2024-06-20 00:57:40 +00:00
bevy_tasks Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_text Optimize common usages of AssetReader (#14082) 2024-07-01 19:59:42 +00:00
bevy_time Make time_system public (#13879) 2024-06-16 18:07:41 +00:00
bevy_transform Merge BuildWorldChildren and BuildChildren traits. (#14052) 2024-07-01 14:29:39 +00:00
bevy_ui Using simple approx round up in ui_layout_system (#14079) 2024-07-03 12:48:34 +00:00
bevy_utils Apply Clippy lints regarding lazy evaluation and closures (#14015) 2024-07-01 15:54:40 +00:00
bevy_window apply window scale to window size when creating it (#13967) 2024-06-21 18:04:57 +00:00
bevy_winit Bump accesskit to 0.16 (#14091) 2024-07-01 14:42:40 +00:00