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raphlinus merged 1 commit into from
Apr 20, 2026
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Fill out list of Vello optimizations, which was TODO #140

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9 changes: 6 additions & 3 deletions content/blog/2026-04-19-tmil-25/index.md
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Expand Up @@ -14,11 +14,15 @@ We've made big improvements to Vello Hybrid, both in capabilities and in perform

Several releases, most recently [sparse strips 0.0.7](https://github.com/linebender/vello/releases/tag/sparse-strips-v0.0.7) (encompassing both Vello CPU and Vello Hybrid) and [Vello 0.8.0](https://github.com/linebender/vello/releases/tag/v0.8.0).

Optimizations:
Optimizations include:
* Fast paths to bypass full coarse rasterization.
* Special case drawing rectangles (as opposed to general Bézier paths)
* First cut at glyph caching – more work is needed.
* TODO fill out more
* Fixed performance issues with heavy gradient use.
* Skipping more unneeded work in layer operations.
* Optimizations for opaque full-tile images.
* Optimized layer blending for src-over compositing.
* Improvements to analytic antialiasing performance.

Vello Hybrid is currently at roughly beta quality; there are some rough edges still and performance work to be done, but it should be usable.

Expand Down Expand Up @@ -115,7 +119,6 @@ Compositor integration is needed for efficient video playback, and is also the b
Bruce Mitchener got tired of waiting and has started the [subduction](https://github.com/forest-rs/subduction) crate, with compelling examples.
To learn more, see the [Subduction: System compositor integration](https://xi.zulipchat.com/#narrow/channel/197075-vello/topic/Subduction.3A.20System.20compositor.20integration/with/582293122) Zulip thread.

<!-- TODO: better screenshot? The web one may be visually more interesting -->
<figure>
<img style="height: auto;" width="1152" height="864" src="subduction_screenshot.png" alt="A screenshot of subduction, showing native mac widgets">
<figcaption>
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