https://bugzilla.wikimedia.org/show_bug.cgi?id=52013
Web browser: ---
Bug ID: 52013
Summary: Deleting plain text from a large page with backspace
or delete is very slow
Product: VisualEditor
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Data Model
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
Mobile Platform: ---
Using the backspace or delete key to delete plain text on a large page takes
hundreds of milliseconds per character, predominantly because
ve.dm.Document.prototype.commit() is called, which leads to
ve.ce.ContentBranchNode.prototype.onChildUpdate(), which leads to
ve.dm.Converter.openAndCloseAnnotations(), which calls
containsComparableForSerialization(), which is apparently O(N).
Bug 52012 also affects backspace performance.
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