Performance: Improve opening of the block inserter via manual token-based analysis of reusable blocks#35763
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The failing PHP unit tests pertain to unrelated changes to Global Styles. Merging! |
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Alternative to #35724.
Fixes #35719.
Props @sathyapulse for identifying the bottleneck.
Description
In the
getInserterItemsblock-editor selector,buildReusableBlockInserterItemparses every saved reusable block in order to identify its outermost block type, so that the inserter UI can display the icon of said block type.This function previously relied on parsing every saved reusable block using the full block parser, i.e.
wp.blocks.parse. This is orders of magnitude slower than raw parsing, which excels at only retrieving the block topology, and is made available bywp.blockSerializationDefaultParser.parse.This pull request extracts the tokenizer regular expression used in package
block-serialization-default-parserand uses it to match the very first block boundary found in a reusable block's markup. This should be significantly faster when a site has thousands of saved reusable blocks.How has this been tested?
Types of changes
Performance fix.
Checklist:
*.native.jsfiles for terms that need renaming or removal).