Previews: avoid unneeded block selectors #60543
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ellatrix
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ellatrix
commented
Apr 7, 2024
| const movingClientId = hasBlockMovingClientId(); | ||
| const blockEditingMode = getBlockEditingMode( clientId ); | ||
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| return { | ||
| ...previewContext, |
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Btw, this makes me wonder what exactly it is below that is making the editable block slower. The pure amount of selectors, or are the particularly slow ones? One of the suspicious ones in getBlockEditingMode because it's recursive, and some of the other selectors make their own calls to getBlockEditingMode.
youknowriad
reviewed
Apr 8, 2024
| : undefined, | ||
| defaultClassName: hasLightBlockWrapper | ||
| ? getBlockDefaultClassName( blockName ) | ||
| : undefined, |
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I'm surprised this PR doesn't cause more issues. I feel like defensively, we should have default values for all of these keys in the previewContext object no?
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Why all? Only some end up as a public API. The rest is all internal context that we have control over. Fixed the public API ones in 04c36b8.
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It was more about avoiding breakage. Like code base assuming some keys are defined...
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I can check all keys in a bit. Most of them are just used once in the block props hook, so it should be easy to double check.
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Added one more (mode) since it's a string and also public API. But the rest all end up in a classnames call or falsy checks.
youknowriad
reviewed
Apr 8, 2024
| return { | ||
| order: _order, | ||
| selectedBlocks: EMPTY_ARRAY, | ||
| visibleBlocks: EMPTY_SET, |
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this one is interesting because it forces all blocks to be async right? This might have a good impact in terms of performance for the different interactions when previews are rendered.
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(Idea for later)
I actually wonder if we can't introduce a "priority" number in priority-queue at some point where we could say:
- First render the sync stuff
- then render async stuff with priority 1
- and only then (maybe wait a couple async callback before running this list), render async stuff with priority 2
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They are already async because there is never any selection in previews. What would be priority 2?
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The early return here is just to prevent the selectors from running, especially getBlockEditingMode below.
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They are already async because there is never any selection in previews. What would be priority 2?
I mean a way to choose that some components even if async are higher priority than other async components.
youknowriad
approved these changes
Apr 8, 2024
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Last result. I've noticed in other runs on other PRs that navigate is very unstable. |
cbravobernal
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Apr 9, 2024
Co-authored-by: ellatrix <ellatrix@git.wordpress.org> Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
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What?
Not sure if this will do much, but we can avoid lots of selectors in the block component if we're in preview mode.
Why?
load patterns (site editor, swap template): -9.39%, -16.91%, -14.03% = -13.44% average
navigate: -7.98%, -14.04%, -16.25% = -12.76% average
How?
Testing Instructions
Testing Instructions for Keyboard
Screenshots or screencast