Chrome v96 performance regression with spell checking in large contenteditable
OS: Any Any · Device: Desktop or Laptop Any · Browser: Chrome 96 · Keyboard: US
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A known Chromium regression around spellcheck and large contenteditable regions caused severe typing lag—documented for planning workarounds such as spellcheck=false or chunking.
A known Chromium regression around spellcheck and large contenteditable regions caused severe typing lag—documented for planning workarounds such as spellcheck=false or chunking.
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| Case | OS | Device | Browser | Keyboard | Status |
|---|---|---|---|---|---|
| ce-0324-chrome-v96-performance-regression-spellcheck | Any Any | Desktop or Laptop Any | Chrome 96 | US | draft |
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OS: Any Any · Device: Desktop or Laptop Any · Browser: Chrome 96 · Keyboard: US
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When a contenteditable element has CSS filters applied (blur, brightness, etc.), editing performance may be degraded. Typing may lag, and selection may be slow to update.
When a contenteditable element has CSS will-change property set, performance may be affected. In some cases, it may improve performance by hinting the browser about upcoming changes. In other cases, it may degrade performance by creating unnecessary layers.
When a ResizeObserver is attached to a contenteditable element, the observer may trigger during editing as content changes size. This can cause layout recalculations and visual jumps, especially when the contenteditable has dynamic height.
When a contenteditable element is used with virtual scrolling libraries (e.g., for large documents), the virtual scrolling mechanism may interfere with text selection and caret positioning. The selection may be lost when elements are removed from the DOM during scrolling.
Browsers try to keep the caret visible by scrolling the editable container or the page. During rapid typing—especially near the bottom or right edge—scroll updates can lag, batch, or feel jarring, so the caret temporarily leaves the viewport or the view jumps unexpectedly.
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