mirror of
https://github.com/bevyengine/bevy
synced 2024-11-22 20:53:53 +00:00
2cd0bd7575
# Objective structs containing wgpu types take a long time to compile. this is particularly bad for generics containing the wgpu structs (like the depth pipeline builder with `#[derive(SystemParam)]` i've been working on). we can avoid that by boxing and type-erasing in the bevy `render_resource` wrappers. type system magic is not a strength of mine so i guess there will be a cleaner way to achieve this, happy to take feedback or for it to be taken as a proof of concept if someone else wants to do a better job. ## Solution - add macros to box and type-erase in debug mode - leave current impl for release mode timings: <html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta name=ProgId content=Excel.Sheet> <meta name=Generator content="Microsoft Excel 15"> <link id=Main-File rel=Main-File href="file:///C:/Users/robfm/AppData/Local/Temp/msohtmlclip1/01/clip.htm"> <link rel=File-List href="file:///C:/Users/robfm/AppData/Local/Temp/msohtmlclip1/01/clip_filelist.xml"> <!--table {mso-displayed-decimal-separator:"\."; mso-displayed-thousand-separator:"\,";} @page {margin:.75in .7in .75in .7in; mso-header-margin:.3in; mso-footer-margin:.3in;} tr {mso-height-source:auto;} col {mso-width-source:auto;} br {mso-data-placement:same-cell;} td {padding-top:1px; padding-right:1px; padding-left:1px; mso-ignore:padding; color:black; font-size:11.0pt; font-weight:400; font-style:normal; text-decoration:none; font-family:Calibri, sans-serif; mso-font-charset:0; mso-number-format:General; text-align:general; vertical-align:bottom; border:none; mso-background-source:auto; mso-pattern:auto; mso-protection:locked visible; white-space:nowrap; mso-rotate:0;} .xl65 {mso-number-format:0%;} .xl66 {vertical-align:middle; white-space:normal;} .xl67 {vertical-align:middle;} --> </head> <body link="#0563C1" vlink="#954F72"> current | | | -- | -- | -- | -- | Total time: | 64.9s | | bevy_pbr v0.9.0-dev | 19.2s | | bevy_render v0.9.0-dev | 17.0s | | bevy_sprite v0.9.0-dev | 15.1s | | DepthPipelineBuilder | 18.7s | | | | with type-erasing | | | diff | Total time: | 49.0s | -24% | bevy_render v0.9.0-dev | 12.0s | -38% | bevy_pbr v0.9.0-dev | 8.7s | -49% | bevy_sprite v0.9.0-dev | 6.1s | -60% | DepthPipelineBuilder | 1.2s | -94% </body> </html> the depth pipeline builder is a binary with body: ```rust use std::{marker::PhantomData, hash::Hash}; use bevy::{prelude::*, ecs::system::SystemParam, pbr::{RenderMaterials, MaterialPipeline, ShadowPipeline}, render::{renderer::RenderDevice, render_resource::{SpecializedMeshPipelines, PipelineCache}, render_asset::RenderAssets}}; fn main() { println!("Hello, world p!\n"); } #[derive(SystemParam)] pub struct DepthPipelineBuilder<'w, 's, M: Material> where M::Data: Eq + Hash + Clone, { render_device: Res<'w, RenderDevice>, material_pipeline: Res<'w, MaterialPipeline<M>>, material_pipelines: ResMut<'w, SpecializedMeshPipelines<MaterialPipeline<M>>>, shadow_pipeline: Res<'w, ShadowPipeline>, pipeline_cache: ResMut<'w, PipelineCache>, render_meshes: Res<'w, RenderAssets<Mesh>>, render_materials: Res<'w, RenderMaterials<M>>, msaa: Res<'w, Msaa>, #[system_param(ignore)] _p: PhantomData<&'s M>, } ``` |
||
|---|---|---|
| .. | ||
| macros | ||
| src | ||
| Cargo.toml | ||