From 15618e81a246064ca864dcce70b38131e73c5d8b Mon Sep 17 00:00:00 2001
From: Mike Hsu <mike.hsu@gmail.com>
Date: Sun, 22 Oct 2023 17:49:57 -0700
Subject: [PATCH 1/4] write some stuff

---
 content/news/2023-10-21-bevy-0.12/index.md      |  10 ++++++++++
 .../tracing-overhead-reduction.png              | Bin 0 -> 15119 bytes
 2 files changed, 10 insertions(+)
 create mode 100644 content/news/2023-10-21-bevy-0.12/tracing-overhead-reduction.png

diff --git a/content/news/2023-10-21-bevy-0.12/index.md b/content/news/2023-10-21-bevy-0.12/index.md
index 5321faf913..a45e086d27 100644
--- a/content/news/2023-10-21-bevy-0.12/index.md
+++ b/content/news/2023-10-21-bevy-0.12/index.md
@@ -19,12 +19,22 @@ Since our last release a few months ago we've added a _ton_ of new features, bug
 
 <div class="release-feature-authors">authors: @author</div>
 
+
+## Reduced Tracing Overhead
+
+<div class="release-feature-authors">authors: @hymm, @james7132</div>
+
+Bevy uses the tracing library to measure systems running time among other things. This is useful for determining where bottlenecks in frametime are and measuring performance improvements. However using tracy has significant overhead to it. A large part of the per span overhead was due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the overhead when using tracing. In the PR caching the system spans the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR caching the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
+
+![tracing overhead](tracing-overhead-reduction.png)
+
 ## <a name="what-s-next"></a>What's Next?
 
 We have plenty of work that is pretty much finished and is therefore very likely to land in **Bevy 0.13**:
 
 Check out the [**Bevy 0.13 Milestone**](https://github.com/bevyengine/bevy/milestone/17) for an up-to-date list of current work being considered for **Bevy 0.13**.
 
+
 ## Support Bevy
 
 Sponsorships help make our work on Bevy sustainable. If you believe in Bevy's mission, consider [sponsoring us](/community/donate) ... every bit helps!
diff --git a/content/news/2023-10-21-bevy-0.12/tracing-overhead-reduction.png b/content/news/2023-10-21-bevy-0.12/tracing-overhead-reduction.png
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From dbace33a1979d626b2740c5e641d6a2de6634664 Mon Sep 17 00:00:00 2001
From: Carter Anderson <mcanders1@gmail.com>
Date: Thu, 26 Oct 2023 19:16:57 -0700
Subject: [PATCH 2/4] Update content/news/2023-10-21-bevy-0.12/index.md

Co-authored-by: Pascal Hertleif <killercup@gmail.com>
---
 content/news/2023-10-21-bevy-0.12/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/content/news/2023-10-21-bevy-0.12/index.md b/content/news/2023-10-21-bevy-0.12/index.md
index a45e086d27..9cc4e2f848 100644
--- a/content/news/2023-10-21-bevy-0.12/index.md
+++ b/content/news/2023-10-21-bevy-0.12/index.md
@@ -24,7 +24,7 @@ Since our last release a few months ago we've added a _ton_ of new features, bug
 
 <div class="release-feature-authors">authors: @hymm, @james7132</div>
 
-Bevy uses the tracing library to measure systems running time among other things. This is useful for determining where bottlenecks in frametime are and measuring performance improvements. However using tracy has significant overhead to it. A large part of the per span overhead was due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the overhead when using tracing. In the PR caching the system spans the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR caching the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
+Bevy uses the [tracing](https://crates.io/crates/tracing) library to measure systems running time among other things. This is useful for determining where bottlenecks in frame time are and measuring performance improvements, and can be visualized using the [tracy](https://github.com/wolfpld/tracy) tool. However, using tracing's spans has a significant overhead to it. A large part of the per-span overhead is due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the overhead when using tracing. In the PR that introduces caching the system spans, the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR that adds caching for the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
 
 ![tracing overhead](tracing-overhead-reduction.png)
 

From 1561e13edd884c2974d20a39191cff6d9ff8e796 Mon Sep 17 00:00:00 2001
From: Carter Anderson <mcanders1@gmail.com>
Date: Thu, 26 Oct 2023 19:18:16 -0700
Subject: [PATCH 3/4] Update index.md

---
 content/news/2023-10-21-bevy-0.12/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/content/news/2023-10-21-bevy-0.12/index.md b/content/news/2023-10-21-bevy-0.12/index.md
index 9cc4e2f848..f941f290e1 100644
--- a/content/news/2023-10-21-bevy-0.12/index.md
+++ b/content/news/2023-10-21-bevy-0.12/index.md
@@ -24,7 +24,7 @@ Since our last release a few months ago we've added a _ton_ of new features, bug
 
 <div class="release-feature-authors">authors: @hymm, @james7132</div>
 
-Bevy uses the [tracing](https://crates.io/crates/tracing) library to measure systems running time among other things. This is useful for determining where bottlenecks in frame time are and measuring performance improvements, and can be visualized using the [tracy](https://github.com/wolfpld/tracy) tool. However, using tracing's spans has a significant overhead to it. A large part of the per-span overhead is due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the overhead when using tracing. In the PR that introduces caching the system spans, the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR that adds caching for the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
+Bevy uses the [tracing](https://crates.io/crates/tracing) library to measure systems running time among other things. This is useful for determining where bottlenecks in frame time are and measuring performance improvements, and can be visualized using the [tracy](https://github.com/wolfpld/tracy) tool. However, using tracing's spans has a significant overhead to it. A large part of the per-span overhead is due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the CPU time overhead when using tracing. In the PR that introduces caching the system spans, the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR that adds caching for the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
 
 ![tracing overhead](tracing-overhead-reduction.png)
 

From d68802a1dce4e6c7099e37e61fa17abbc03e06c4 Mon Sep 17 00:00:00 2001
From: Carter Anderson <mcanders1@gmail.com>
Date: Thu, 26 Oct 2023 19:22:17 -0700
Subject: [PATCH 4/4] Update index.md

---
 content/news/2023-10-21-bevy-0.12/index.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/content/news/2023-10-21-bevy-0.12/index.md b/content/news/2023-10-21-bevy-0.12/index.md
index f941f290e1..3ccada4657 100644
--- a/content/news/2023-10-21-bevy-0.12/index.md
+++ b/content/news/2023-10-21-bevy-0.12/index.md
@@ -24,7 +24,7 @@ Since our last release a few months ago we've added a _ton_ of new features, bug
 
 <div class="release-feature-authors">authors: @hymm, @james7132</div>
 
-Bevy uses the [tracing](https://crates.io/crates/tracing) library to measure systems running time among other things. This is useful for determining where bottlenecks in frame time are and measuring performance improvements, and can be visualized using the [tracy](https://github.com/wolfpld/tracy) tool. However, using tracing's spans has a significant overhead to it. A large part of the per-span overhead is due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the CPU time overhead when using tracing. In the PR that introduces caching the system spans, the many foxes stress test went from 5.35 ms to 4.54 ms. In the PR that adds caching for the parallel iteration spans, the many cubes stress test went from 8.89 ms to 6.8 ms.
+Bevy uses the [tracing](https://crates.io/crates/tracing) library to measure system running time (among other things). This is useful for determining where bottlenecks in frame time are and measuring performance improvements. These traces can be visualized using the [tracy](https://github.com/wolfpld/tracy) tool. However, using tracing's spans has a significant overhead to it. A large part of the per-span overhead is due to allocating the string description of the span. By caching the spans for systems, commands, and parallel iteration, we have significantly reduced the CPU time overhead when using tracing. In the PR that introduced system span caching, our "many foxes" stress test went from 5.35 ms to 4.54 ms. In the PR that added caching for the parallel iteration spans, our "many cubes" stress test went from 8.89 ms to 6.8 ms.
 
 ![tracing overhead](tracing-overhead-reduction.png)