useScaleCanvas performance improvements #67496
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Size Change: -57 B (0%) Total Size: 1.83 MB
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jeryj
added
[Feature] Zoom Out
[Type] Regression
…f container height has changed between renders
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Flaky tests detected in 39a27cd. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/12126279890
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ellatrix
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Dec 2, 2024
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I think we can get the clean up merged, since it used to work like that. Would prefer if the rest is changed separately, but up to you, it seems fine.
Would love if we could try to move all the CSS variable setting and scroll calc to right before the animation runs, but can be done separately.
jeryj
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im3dabasia
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Dec 4, 2024
* Rely on containerHeight resize listener instead of iframe.documentElement.clientHeight when setting the CSS variable * Only add CSS variables if we need them (scaleValue < 1) * Remove unmounting of CSS variables in useEffect return --------- Co-authored-by: Ella <ella@vandurpe.com>
michalczaplinski
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that referenced
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Dec 5, 2024
* Rely on containerHeight resize listener instead of iframe.documentElement.clientHeight when setting the CSS variable * Only add CSS variables if we need them (scaleValue < 1) * Remove unmounting of CSS variables in useEffect return --------- Co-authored-by: Ella <ella@vandurpe.com>
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Rely on
containerHeightresize listener instead of iframe.documentElement.clientHeightWhat?
Rely on containerHeight resize listener instead of
iframe.documentElement.clientHeightwhen setting the CSS variables to fix the first block metric impact caused by #66917.Why?
There was a performance hit when using
iframe.documentElement.clientHeight.How?
Get the
containerHeightfrom the existing resize listener.Testing Instructions
Testing Instructions for Keyboard
Screenshots or screencast
I ran
npm run test:performance test/performance/specs/post-editor.spec.jslocally to see the first block metric, since it was the one that was most impacted.Baseline: Without useScaleCanvas(): This is what we hope to return to
│ firstBlock │ '1825.45 ms +2.1% -2.47%' │
│ firstBlock │ '1864.6 ms +1.53% -1.81%' │
Original Perf issue: With useScaleCanvas()
│ firstBlock │ '2221.9 ms +2.6% -4.08%' │
│ firstBlock │ '2185.8 ms +2.48% -3.89%' │
Fix 1 (#67481, #67495): Mounting hook for
prevIsZoomedOutso it doesn't run on mount│ firstBlock │ '2020.55 ms +2.43% -2.56%' │
│ firstBlock │ '2091.9 ms +0.59% -2.96%' │
Fix 2: Use containerHeight instead of iframeDocument.documentElement.clientHeight
│ firstBlock │ '1934.45 ms +2.1% -1.05%' │
│ firstBlock │ '1875.4 ms +0.83% -0.47%' │
Fix 3: Remove useEffect unmounting the CSS variables
│ firstBlock │ '1900.75 ms +2.26% -0.8%' │
│ firstBlock │ '1908.8 ms +0.67% -4.78%' │
Fix 4: Only set CSS variables on scaleValue < 1: Yay! Baseline as been achieved.
│ firstBlock │ '1795.5 ms +0.47% -0.3%' │
│ firstBlock │ '1817.4 ms +1.38% -1.02%' │
To be sure, check only set CSS variables on scaleValue < 1, but preserve unmounting all CSS variables in useEffect unmount (remove Fix 3)
│ firstBlock │ '1872.3 ms +2.85% -4.1%' │
│ firstBlock │ '1831 ms +2.21% -1.59%' │
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