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Edit site: WAAPIfy canvas moving animation #62435

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@stokesman stokesman commented Jun 9, 2024

What?

Refactors canvas moving animation so it doesn’t run on the main thread its timing is less impacted by jank.

Why?

  • Performance.
  • One fewer dependency.

How?

Computes the animation keyframes before starting it and passes them to animate.

More

The idea and the (adapted) implementation are borrowed from Svelte. This generates the keyframes needed for an animation beforehand and that enables Element’s animate method to handle the rest (off the main thread 🎉). That’s in contrast to the current implementation that on every animation frame computes the keyframe and applies it to the element imperatively.

Update: I’ve learned that because the animation is changing the element’s width and height the animation can still stutter if the main thread gets busy. However, the duration remains close to what it’s supposed to be unlike the current implementation where the duration gets stretched out. So it’s still a slight improvement for the worst case scenarios.

Testing Instructions

  1. Open the site editor
  2. Navigate around and/or enter/exit view and edit modes.
  3. Verify the animation feels the same.

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github-actions bot commented Jun 9, 2024

Size Change: -16.1 kB (-0.92%)

Total Size: 1.73 MB

Filename Size Change
build/edit-site/index.min.js 191 kB -16.1 kB (-7.77%)
ℹ️ View Unchanged
Filename Size
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github-actions bot commented Jun 9, 2024

Flaky tests detected in 590c54e.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/9438501143
📝 Reported issues:

@stokesman stokesman changed the title WAAPIfy canvas moving animation Edit site: WAAPIfy canvas moving animation Jun 9, 2024
@stokesman stokesman added [Type] Performance Related to performance efforts [Package] Edit Site /packages/edit-site labels Jun 9, 2024
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@stokesman stokesman marked this pull request as ready for review June 9, 2024 21:02
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github-actions bot commented Jun 9, 2024

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Co-authored-by: stokesman <presstoke@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: ellatrix <ellatrix@git.wordpress.org>

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stokesman added 3 commits June 9, 2024 16:19
It’s not recommended in the spec and unnecessary for the particular
animation case.
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Are there any libraries around element.animate? It does make it a bit harder to understand what's going on, and thus harder to maintain. Btw, there's also a block moving animation that could be swapped, maybe in a separate PR though.

@ellatrix ellatrix requested a review from youknowriad June 10, 2024 04:36
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stokesman commented Jun 10, 2024

Are there any libraries around element.animate?

motion and @okikio/animate. Motion One is quite small and it’d probably be worth a try for this. I'm not sure that it supports custom easing like the animation currently uses. I suppose that may not be a hard requirement though. If not, the implementation here might also be simplified to such a degree that maintenance isn’t a concern.

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I think @youknowriad moved it from Motion to React Spring, but I could be recalling it incorrectly.

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but I could be recalling it incorrectly

I believe you're correct. Just that it was moved from framer-motion and motion is a different package (same author).

* @param {number} target The target progression — `1` is end, `0` is beginning.
* @param {(() => void) | undefined} callback
*/
const animate = ( element, config, target = 1, callback ) => {
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Is this some kind of generic utility you wrote on your own? Do we expect this to be reused elsewhere (block animation maybe as I just copied that one and adapted it to create this file)

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I pared down Svelte’s internal animate. It would serve for reuse, the block animation could pass a different config (one that operates only on transfrom which should make that one run on the GPU). I’d thought we’d want to try that if this worked well in this instance.

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Are we able to notice perf improvements or less lags or something with this PR?

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In my testing, the trunk animation feels better (less jumpy). For this one for instance I can see the edge of the frame move left than right in some occasions.

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Are we able to notice perf improvements or less lags or something with this PR?

Ideally there’s no difference in best-case scenarios where both animations aren’t impacted by main thread slowness.

In my testing, the trunk animation feels better (less jumpy).

I think that’s possible. This way of running the animation keeps the duration close to specified, so if it stutters it’s a bigger stutter because the motion is compensated to keep the duration accurate.

I can see the edge of the frame move left than right in some occasions.

I didn’t notice that but I’m curious and will try to repro.

Thanks for testing!

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3 participants