bevy/crates/bevy_render/Cargo.toml
James Liu 389df18343 Change check_visibility to use thread-local queues instead of a channel (#4663)
# Objective
Further speed up visibility checking by removing the main sources of contention for the system.

## Solution
 - ~~Make `ComputedVisibility` a resource wrapping a `FixedBitset`.~~
 - ~~Remove `ComputedVisibility` as a component.~~

~~This adds a one-bit overhead to every entity in the app world. For a game with 100,000 entities, this is 12.5KB of memory. This is still small enough to fit entirely in most L1 caches. Also removes the need for a per-Entity change detection tick. This reduces the memory footprint of ComputedVisibility 72x.~~

~~The decreased memory usage and less fragmented memory locality should provide significant performance benefits.~~

~~Clearing visible entities should be significantly faster than before:~~
 
 - ~~Setting one `u32` to 0 clears 32 entities per cycle.~~
 - ~~No archetype fragmentation to contend with.~~
 - ~~Change detection is applied to the resource, so there is no per-Entity update tick requirement.~~

~~The side benefit of this design is that it removes one more "computed component" from userspace.  Though accessing the values within it are now less ergonomic.~~

This PR changes `crossbeam_channel` in `check_visibility` to use a `Local<ThreadLocal<Cell<Vec<Entity>>>` to mark down visible entities instead.

Co-Authored-By: TheRawMeatball <therawmeatball@gmail.com>
Co-Authored-By: Aevyrie <aevyrie@gmail.com>
2022-06-21 18:10:27 +00:00

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TOML

[package]
name = "bevy_render"
version = "0.8.0-dev"
edition = "2021"
description = "Provides rendering functionality for Bevy Engine"
homepage = "https://bevyengine.org"
repository = "https://github.com/bevyengine/bevy"
license = "MIT OR Apache-2.0"
keywords = ["bevy"]
[features]
png = ["image/png"]
hdr = ["image/hdr"]
tga = ["image/tga"]
jpeg = ["image/jpeg"]
bmp = ["image/bmp"]
dds = ["ddsfile"]
# For ktx2 supercompression
zlib = ["flate2"]
zstd = ["ruzstd"]
trace = []
tracing-tracy = []
wgpu_trace = ["wgpu/trace"]
ci_limits = []
webgl = ["wgpu/webgl"]
[dependencies]
# bevy
bevy_app = { path = "../bevy_app", version = "0.8.0-dev" }
bevy_asset = { path = "../bevy_asset", version = "0.8.0-dev" }
bevy_core = { path = "../bevy_core", version = "0.8.0-dev" }
bevy_derive = { path = "../bevy_derive", version = "0.8.0-dev" }
bevy_ecs = { path = "../bevy_ecs", version = "0.8.0-dev" }
bevy_encase_derive = { path = "../bevy_encase_derive", version = "0.8.0-dev" }
bevy_math = { path = "../bevy_math", version = "0.8.0-dev" }
bevy_mikktspace = { path = "../bevy_mikktspace", version = "0.8.0-dev" }
bevy_reflect = { path = "../bevy_reflect", version = "0.8.0-dev", features = ["bevy"] }
bevy_render_macros = { path = "macros", version = "0.8.0-dev" }
bevy_transform = { path = "../bevy_transform", version = "0.8.0-dev" }
bevy_window = { path = "../bevy_window", version = "0.8.0-dev" }
bevy_utils = { path = "../bevy_utils", version = "0.8.0-dev" }
# rendering
image = { version = "0.24", default-features = false }
# misc
wgpu = { version = "0.12.0", features = ["spirv"] }
codespan-reporting = "0.11.0"
naga = { version = "0.8.0", features = ["glsl-in", "spv-in", "spv-out", "wgsl-in", "wgsl-out"] }
serde = { version = "1", features = ["derive"] }
bitflags = "1.2.1"
smallvec = { version = "1.6", features = ["union", "const_generics"] }
once_cell = "1.4.1" # TODO: replace once_cell with std equivalent if/when this lands: https://github.com/rust-lang/rfcs/pull/2788
downcast-rs = "1.2.0"
thread_local = "1.1"
thiserror = "1.0"
futures-lite = "1.4.0"
anyhow = "1.0"
hex = "0.4.2"
hexasphere = "7.0.0"
parking_lot = "0.11.0"
regex = "1.5"
copyless = "0.1.5"
ddsfile = { version = "0.5.0", optional = true }
ktx2 = { version = "0.3.0", optional = true }
# For ktx2 supercompression
flate2 = { version = "1.0.22", optional = true }
ruzstd = { version = "0.2.4", optional = true }
# For transcoding of UASTC/ETC1S universal formats, and for .basis file support
basis-universal = { version = "0.2.0", optional = true }
encase = { version = "0.2", features = ["glam"] }