Very important Performance Improvements

Author: thecoolwinter

Sources/CodeEditTextView/TextLayoutManager/TextLayoutManager+Layout.swift

@@ -92,14 +92,19 @@ extension TextLayoutManager {
 #if DEBUG
         isInLayout = false
 #endif
-        CATransaction.commit()
-
         // Enqueue any lines not used in this layout pass.
         viewReuseQueue.enqueueViews(notInSet: usedFragmentIDs)
 
         // Update the visible lines with the new set.
         visibleLineIds = newVisibleLines
 
+        // The delegate methods below may call another layout pass, make sure we don't send it into a loop of forced
+        // layout.
+        needsLayout = false
+
+        // Commit the view tree changes we just made.
+        CATransaction.commit()
+
         // These are fine to update outside of `isInLayout` as our internal data structures are finalized at this point
         // so laying out again won't break our line storage or visible line.
 
@@ -114,8 +119,6 @@ extension TextLayoutManager {
         if originalHeight != lineStorage.height || layoutView?.frame.size.height != lineStorage.height {
             delegate?.layoutManagerHeightDidUpdate(newHeight: lineStorage.height)
         }
-
-        needsLayout = false
     }
 
     // MARK: - Layout Single Line

Sources/CodeEditTextView/TextLine/TextLine.swift

@@ -31,7 +31,14 @@ public final class TextLine: Identifiable, Equatable {
     /// - Returns: True, if this line has been marked as needing layout using ``TextLine/setNeedsLayout()`` or if the
     ///            line needs to find new line breaks due to a new constraining width.
     func needsLayout(maxWidth: CGFloat) -> Bool {
-        needsLayout || maxWidth != self.maxWidth
+        needsLayout // Force layout
+        || (
+            // Both max widths we're comparing are finite
+            maxWidth.isFinite
+            && (self.maxWidth ?? 0.0).isFinite
+            // The new max width is less than the required space, so we need to layout again.
+            && maxWidth < (self.maxWidth ?? 0.0)
+        )
     }
 
     /// Prepares the line for display, generating all potential line breaks and calculating the real height of the line.