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Block Editor: Optimize resizable preview hooks #22511

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merged 3 commits into from
May 21, 2020

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@aduth aduth commented May 20, 2020

Previously: #19082

This pull request seeks to optimize hooks used in rendering resizable previews. Currently, useSimulatedMediaQuery is the highest self-time spent during page load, despite only being relevant for use in the resizable previews:

Screen Shot 2020-05-20 at 6 50 06 PM

The changes in this pull request seek to try to do as much as possible to defer transforms and resize event handlers only when relevant (when using device preview modes).

Testing Instructions:

Repeat Testing Instructions from #19082, verifying there are no regressions.

@aduth aduth added [Type] Performance Related to performance efforts [Package] Block editor /packages/block-editor labels May 20, 2020
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Size Change: +10 B (0%)

Total Size: 1.12 MB

Filename Size Change
build/block-editor/index.js 105 kB +10 B (0%)
ℹ️ View Unchanged
Filename Size Change
build/a11y/index.js 1.02 kB 0 B
build/annotations/index.js 3.62 kB 0 B
build/api-fetch/index.js 3.39 kB 0 B
build/autop/index.js 2.83 kB 0 B
build/blob/index.js 620 B 0 B
build/block-directory/index.js 6.93 kB 0 B
build/block-directory/style-rtl.css 790 B 0 B
build/block-directory/style.css 791 B 0 B
build/block-editor/style-rtl.css 10.8 kB 0 B
build/block-editor/style.css 10.8 kB 0 B
build/block-library/editor-rtl.css 7.17 kB 0 B
build/block-library/editor.css 7.17 kB 0 B
build/block-library/index.js 119 kB 0 B
build/block-library/style-rtl.css 7.48 kB 0 B
build/block-library/style.css 7.48 kB 0 B
build/block-library/theme-rtl.css 683 B 0 B
build/block-library/theme.css 685 B 0 B
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build/components/style-rtl.css 17.1 kB 0 B
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build/compose/index.js 9.24 kB 0 B
build/core-data/index.js 11.4 kB 0 B
build/data-controls/index.js 1.29 kB 0 B
build/data/index.js 8.42 kB 0 B
build/date/index.js 5.47 kB 0 B
build/deprecated/index.js 772 B 0 B
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build/editor/style.css 5.08 kB 0 B
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build/format-library/style.css 502 B 0 B
build/hooks/index.js 2.13 kB 0 B
build/html-entities/index.js 622 B 0 B
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build/is-shallow-equal/index.js 711 B 0 B
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Thanks for fixing this @aduth!

We might have to revisit having Desktop as default if we implement Desktop previews on mobile devices but for now it's working very well.

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aduth commented May 21, 2020

Thanks @tellthemachines !

Regarding the default, as I was looking at the code, I also wonder if it's something where we can do more to disambiguate default from one of the specific states. I had some initial confusion in considering "Default" as in contrast to "Tablet" and "Mobile", likely because I was thinking of it more in the way of the comment you referenced at #13203 (comment) where "Desktop" could be a valid preview mode, even in a smaller device. In that case, we should probably want to more explicitly disambiguate the default neutral state.

In some ways, I think these changes might help move a bit more in that direction, e.g. removing assumptions around specific canvas widths for the neutral state. Maybe a good next step could be to replace the 'Desktop' deviceType string (as it's used today) with a null value. At some point in the future, the 'Desktop' state could be reintroduced to represent what's described in #13203 (comment).

@aduth aduth merged commit 53cec2f into master May 21, 2020
@aduth aduth deleted the update/resizable-canvas-perf branch May 21, 2020 19:27
@github-actions github-actions bot added this to the Gutenberg 8.2 milestone May 21, 2020
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