diff --git a/frontend/src/components/pageEditor/PageEditor.tsx b/frontend/src/components/pageEditor/PageEditor.tsx
index 39c6c706b..45c0e9717 100644
--- a/frontend/src/components/pageEditor/PageEditor.tsx
+++ b/frontend/src/components/pageEditor/PageEditor.tsx
@@ -698,14 +698,16 @@ const PageEditor = ({
               zIndex: 10
             }}
           >
-            {Array.from(splitPositions).map((position) => {
-              // Match DragDropGrid's layout calculations exactly
+            {(() => {
+              // Calculate remToPx once outside the map to avoid layout thrashing
               const containerWidth = containerDimensions.width;
               const remToPx = parseFloat(getComputedStyle(document.documentElement).fontSize);
               const ITEM_WIDTH = parseFloat(GRID_CONSTANTS.ITEM_WIDTH) * remToPx;
               const ITEM_HEIGHT = parseFloat(GRID_CONSTANTS.ITEM_HEIGHT) * remToPx;
               const ITEM_GAP = parseFloat(GRID_CONSTANTS.ITEM_GAP) * remToPx;
               
+              return Array.from(splitPositions).map((position) => {
+              
               // Calculate items per row using DragDropGrid's logic
               const availableWidth = containerWidth - ITEM_GAP; // Account for first gap
               const itemWithGap = ITEM_WIDTH + ITEM_GAP;
@@ -736,7 +738,8 @@ const PageEditor = ({
                   }}
                 />
               );
-            })}
+              });
+            })()}
           </div>
 
           {/* Pages Grid */}
diff --git a/frontend/src/services/documentManipulationService.ts b/frontend/src/services/documentManipulationService.ts
index 75cf7d27e..6ff0eb87e 100644
--- a/frontend/src/services/documentManipulationService.ts
+++ b/frontend/src/services/documentManipulationService.ts
@@ -58,7 +58,7 @@ export class DocumentManipulationService {
     const documents: PDFDocument[] = [];
     const splitPoints: number[] = [];
     
-    // Find split points - pages with splitAfter create split points AFTER them
+    // Find split points
     document.pages.forEach((page, index) => {
       if (page.splitAfter) {
         console.log(`Found split marker at page ${page.pageNumber} (index ${index}), adding split point at ${index + 1}`);
@@ -117,8 +117,6 @@ export class DocumentManipulationService {
     // Apply rotation changes from DOM
     updatedPage.rotation = this.getRotationFromDOM(pageElement, page);
     
-    // Apply split marker changes from document state (already handled by commands)
-    // Split markers are already updated by ToggleSplitCommand, so no DOM reading needed
     
     return updatedPage;
   }
diff --git a/frontend/src/services/pdfExportService.ts b/frontend/src/services/pdfExportService.ts
index 96b8b8670..fe3e314e0 100644
--- a/frontend/src/services/pdfExportService.ts
+++ b/frontend/src/services/pdfExportService.ts
@@ -211,7 +211,6 @@ export class PDFExportService {
    * Download multiple files as a ZIP
    */
   async downloadAsZip(blobs: Blob[], filenames: string[], zipFilename: string): Promise<void> {
-    // For now, download files individually
     blobs.forEach((blob, index) => {
       setTimeout(() => {
         this.downloadFile(blob, filenames[index]);
diff --git a/frontend/src/services/pdfWorkerManager.ts b/frontend/src/services/pdfWorkerManager.ts
index c15e2c207..0999c5c29 100644
--- a/frontend/src/services/pdfWorkerManager.ts
+++ b/frontend/src/services/pdfWorkerManager.ts
@@ -94,7 +94,6 @@ class PDFWorkerManager {
         try {
           loadingTask.destroy();
         } catch (destroyError) {
-          // Silent cleanup failure
         }
       }
       throw error;
@@ -167,7 +166,6 @@ class PDFWorkerManager {
       try {
         pdf.destroy();
       } catch (error) {
-        // Silent cleanup
       }
     });
     
diff --git a/frontend/src/services/thumbnailGenerationService.ts b/frontend/src/services/thumbnailGenerationService.ts
index be508fd1a..a81ca44ed 100644
--- a/frontend/src/services/thumbnailGenerationService.ts
+++ b/frontend/src/services/thumbnailGenerationService.ts
@@ -208,8 +208,6 @@ export class ThumbnailGenerationService {
     // Release reference to PDF document (don't destroy - keep in cache)
     this.releasePDFDocument(fileId);
     
-    // Optionally clean up PDF document from cache to free workers faster
-    // This can be called after thumbnail generation is complete for a file
     this.cleanupCompletedDocument(fileId);
     
     return allResults;