Open
Description
Bevy version
0.16.1
Relevant system information
2025-07-08T06:43:09.456225Z INFO bevy_diagnostic::system_information_diagnostics_plugin::internal: SystemInfo { os: "Windows 11 Home", kernel: "26100", cpu: "12th Gen Intel(R) Core(TM) i7-12700H", core_count: "14", memory: "31.7 GiB" }
2025-07-08T06:43:09.969508Z INFO bevy_render::renderer: AdapterInfo { name: "NVIDIA GeForce RTX 3070 Ti Laptop GPU", vendor: 4318, device: 9440, device_type: DiscreteGpu, driver: "NVIDIA", driver_info: "576.88", backend: Vulkan }
What you did
I wrote a simple benchmarking tool to see how Bevy behaves with a high amount of entities and realized that new sprites become invisible as soon as there are more than 1000 entities existing. You just see a short blink of the new sprite when it got spawned but it disappears immediately afterwards. I did the same test with Mesh2d and MeshMaterial2d but got the same result.
Here the code to reproduce the issue:
use bevy::diagnostic::{EntityCountDiagnosticsPlugin, FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin};
use bevy::prelude::*;
use bevy::window::WindowResolution;
pub const WINDOW_WIDTH: f32 = 1024.0;
pub const WINDOW_HEIGHT: f32 = 768.0;
pub const MAX_X: f32 = WINDOW_WIDTH / 2.0;
pub const MAX_Y: f32 = WINDOW_HEIGHT / 2.0;
#[derive(Component)]
pub struct Direction(Vec2);
#[derive(Resource, Default)]
pub struct LastSpawn{
seconds: f32,
direction: Vec2,
amount: usize
}
fn main() {
App::new()
.add_plugins((
DefaultPlugins.set(WindowPlugin {
primary_window: Some(Window {
title: "Benchmark".into(),
resolution: WindowResolution::new(WINDOW_WIDTH, WINDOW_HEIGHT),
..default()
}),
..default()
}),
EntityCountDiagnosticsPlugin::default(),
FrameTimeDiagnosticsPlugin::default(),
LogDiagnosticsPlugin::default(),
))
.insert_resource(ClearColor(Color::BLACK))
.insert_resource(LastSpawn{seconds: -1.0, direction: Vec2::new(1.0, 0.0), amount: 0})
.add_systems(Startup, setup)
.add_systems(Update, (spawn_sprite, move_sprite))
.run();
}
fn setup(mut commands: Commands) {
commands.spawn(Camera2d);
}
fn spawn_sprite(mut commands: Commands,
mut last_spawn: ResMut<LastSpawn>,
time: Res<Time>) {
if last_spawn.seconds < time.elapsed_secs().floor() {
last_spawn.seconds = time.elapsed_secs().floor();
let next_amount = last_spawn.amount + 5;
last_spawn.amount = next_amount;
for _ in 0..next_amount {
let next_direction = last_spawn.direction.rotate(Vec2::new(0.95, 0.05));
last_spawn.direction = next_direction;
commands.spawn((Direction(next_direction),
Sprite::from_color(Color::srgb(1.0, 0.0, 0.0), Vec2::new(1.0, 1.0)),
));
}
}
}
fn move_sprite(mut query: Query<(&mut Transform, &mut Direction)>, time: Res<Time>) {
for (mut transform, mut pedestrian) in query.iter_mut() {
if transform.translation.x.abs() > MAX_X || transform.translation.y.abs() > MAX_Y {
pedestrian.0 = pedestrian.0.rotate(Vec2::new(0.9, -0.1));
}
transform.translation += Vec3::from((pedestrian.0.normalize() * time.delta_secs() * 10.0, 0.0));
}
}What went wrong
The newly spawned Sprites just blink up. I was expecting that they stay visible
Additional information
I made a video of the issue. The blinking is hard to see in the video, but you can see it when you look closely. I was not able to get a better video. It is very easy to spot in reality