From 0e617b27085c0b8e3daa6b33d64cc3244b271f96 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Tue, 10 Oct 2023 00:11:22 +0200
Subject: [PATCH 1/3] foxes shouldn't march in sync

---
 examples/stress_tests/many_foxes.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/examples/stress_tests/many_foxes.rs b/examples/stress_tests/many_foxes.rs
index 194100658bd6e..c9ab18eed1f17 100644
--- a/examples/stress_tests/many_foxes.rs
+++ b/examples/stress_tests/many_foxes.rs
@@ -200,12 +200,12 @@ fn setup(
 fn setup_scene_once_loaded(
     animations: Res<Animations>,
     foxes: Res<Foxes>,
-    mut player: Query<&mut AnimationPlayer>,
+    mut player: Query<(Entity, &mut AnimationPlayer)>,
     mut done: Local<bool>,
 ) {
     if !*done && player.iter().len() == foxes.count {
-        for mut player in &mut player {
-            player.play(animations.0[0].clone_weak()).repeat();
+        for (entity, mut player) in &mut player {
+            player.play(animations.0[0].clone_weak()).repeat().seek_to(entity.index() as f32 / 10.0);
         }
         *done = true;
     }

From c89a0b13291ba0c346ed667d695fe3ed0a842293 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Tue, 10 Oct 2023 00:18:01 +0200
Subject: [PATCH 2/3] format

---
 examples/stress_tests/many_foxes.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/examples/stress_tests/many_foxes.rs b/examples/stress_tests/many_foxes.rs
index c9ab18eed1f17..bda8aa949dc70 100644
--- a/examples/stress_tests/many_foxes.rs
+++ b/examples/stress_tests/many_foxes.rs
@@ -205,7 +205,10 @@ fn setup_scene_once_loaded(
 ) {
     if !*done && player.iter().len() == foxes.count {
         for (entity, mut player) in &mut player {
-            player.play(animations.0[0].clone_weak()).repeat().seek_to(entity.index() as f32 / 10.0);
+            player
+                .play(animations.0[0].clone_weak())
+                .repeat()
+                .seek_to(entity.index() as f32 / 10.0);
         }
         *done = true;
     }

From 691b6b96ba70e518f3ba566b6a0b6278f422fe72 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Tue, 10 Oct 2023 00:31:30 +0200
Subject: [PATCH 3/3] use argh for cli parameters

---
 examples/stress_tests/many_foxes.rs | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/examples/stress_tests/many_foxes.rs b/examples/stress_tests/many_foxes.rs
index bda8aa949dc70..367b437cfbbe7 100644
--- a/examples/stress_tests/many_foxes.rs
+++ b/examples/stress_tests/many_foxes.rs
@@ -4,6 +4,7 @@
 use std::f32::consts::PI;
 use std::time::Duration;
 
+use argh::FromArgs;
 use bevy::{
     diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
     pbr::CascadeShadowConfigBuilder,
@@ -11,14 +12,29 @@ use bevy::{
     window::{PresentMode, WindowPlugin},
 };
 
+#[derive(FromArgs, Resource)]
+/// `many_foxes` stress test
+struct Args {
+    /// wether all foxes run in sync.
+    #[argh(switch)]
+    sync: bool,
+
+    /// total number of foxes.
+    #[argh(option, default = "1000")]
+    count: usize,
+}
+
 #[derive(Resource)]
 struct Foxes {
     count: usize,
     speed: f32,
     moving: bool,
+    sync: bool,
 }
 
 fn main() {
+    let args: Args = argh::from_env();
+
     App::new()
         .add_plugins((
             DefaultPlugins.set(WindowPlugin {
@@ -33,11 +49,10 @@ fn main() {
             LogDiagnosticsPlugin::default(),
         ))
         .insert_resource(Foxes {
-            count: std::env::args()
-                .nth(1)
-                .map_or(1000, |s| s.parse::<usize>().unwrap()),
+            count: args.count,
             speed: 2.0,
             moving: true,
+            sync: args.sync,
         })
         .insert_resource(AmbientLight {
             color: Color::WHITE,
@@ -205,10 +220,10 @@ fn setup_scene_once_loaded(
 ) {
     if !*done && player.iter().len() == foxes.count {
         for (entity, mut player) in &mut player {
-            player
-                .play(animations.0[0].clone_weak())
-                .repeat()
-                .seek_to(entity.index() as f32 / 10.0);
+            player.play(animations.0[0].clone_weak()).repeat();
+            if !foxes.sync {
+                player.seek_to(entity.index() as f32 / 10.0);
+            }
         }
         *done = true;
     }