• Combine DOM traversals for positioned parent and clipping node lookups into a single pass
• Cache computed styles during traversal to avoid redundant getComputedStyle calls
• Reduce calls from 2n + 2 to n for DOM trees of depth n (57% reduction for typical cases)
• Improve performance for anchored positioning with deep DOM trees

#665 7fa6e9a Thanks @ kelsey-myers! - [Focus Zone] Fix edge-case where prepended element is not focused when elements are reordered

#657 457a1fb Thanks @ mattcosta7! - Optimize DOM operations for better web vitals (INP, CLS, FID)

• Batch reflow-causing reads in isFocusable() to minimize layout thrashing
• Use Set for O(1) tag lookups instead of Array.includes()
• Optimize getClippingRect() and getPositionedParent() with early exits
• Batch MutationObserver DOM operations (read phase, then write phase)
• Add sr-only inline styles to focus-trap sentinels to prevent CLS
• Use :scope selector for faster direct-child sentinel lookup
• Add IndexedSet for O(1) membership checks in focus zone hot paths

#648 0cd03c3 Thanks @ TylerJDev! - FocusZone: Introduce a new focusInStrategy option, "initial," to allow disabling the default behavior of focusing on the first item when the focus zone becomes active.

#641 cd90185 Thanks @ TylerJDev! - FocusZone: Add setting ignoreHoverEvents which provides a configurable setting to disable selection on mouse hover