no need to pass complete files list to getThumbnail

src/components/PhotoFrame.tsx

@@ -546,26 +546,18 @@ const PhotoFrame = ({
         }
     };
     const getThumbnail = (
-        files: EnteFile[],
+        item: EnteFile,
         index: number,
         isScrolling: boolean
-    ) =>
+    ) => (
-        files[index] ? (
         <PreviewCard
-                key={`tile-${files[index].id}-selected-${
+            key={`tile-${item.id}-selected-${selected[item.id] ?? false}`}
-                    selected[files[index].id] ?? false
+            file={item}
-                }`}
-                file={files[index]}
             updateURL={updateURL(index)}
             onClick={onThumbnailClick(index)}
-                onSelect={handleSelect(
+            onSelect={handleSelect(item.id, item.ownerID === user.id, index)}
-                    files[index].id,
-                    files[index].ownerID === user.id,
-                    index
-                )}
             selected={
-                    selected.collectionID === activeCollection &&
+                selected.collectionID === activeCollection && selected[item.id]
-                    selected[files[index].id]
             }
             selectOnClick={selected.count > 0}
             onHover={onHoverOver(index)}
@@ -578,8 +570,6 @@ const PhotoFrame = ({
             activeCollection={activeCollection}
             showPlaceholder={isScrolling}
         />
-        ) : (
-            <></>
     );
 
     const getSlideData = async (

src/components/PhotoList.tsx

@@ -163,7 +163,7 @@ interface Props {
     filteredData: EnteFile[];
     showAppDownloadBanner: boolean;
     getThumbnail: (
-        files: EnteFile[],
+        file: EnteFile,
         index: number,
         isScrolling?: boolean
     ) => JSX.Element;
@@ -654,7 +654,7 @@ export function PhotoList({
             case ITEM_TYPE.FILE: {
                 const ret = listItem.items.map((item, idx) =>
                     getThumbnail(
-                        filteredData,
+                        item,
                         listItem.itemStartIndex + idx,
                         isScrolling
                     )