From c79f7cc874d35bece298cb4429fa0fc7c6bc5681 Mon Sep 17 00:00:00 2001
From: schroda <50052685+schroda@users.noreply.github.com>
Date: Sun, 29 Dec 2024 17:21:37 +0100
Subject: [PATCH] Improve "page load state" updates

Changes of d6ff85fdd37a24ecef29b3e10b7387fbba6cdecc decreased the render performance due to the "onLoad" function changing and causing all pages to re-render.
---
 src/modules/reader/components/viewer/ReaderViewer.tsx | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/modules/reader/components/viewer/ReaderViewer.tsx b/src/modules/reader/components/viewer/ReaderViewer.tsx
index f1014553..da9b72e7 100644
--- a/src/modules/reader/components/viewer/ReaderViewer.tsx
+++ b/src/modules/reader/components/viewer/ReaderViewer.tsx
@@ -192,9 +192,15 @@ const BaseReaderViewer = forwardRef(
                     return;
                 }
 
-                setPageLoadStates((statePageLoadStates) => statePageLoadStates.toSpliced(index, 1, { loaded: true }));
+                setPageLoadStates((statePageLoadStates) => {
+                    if (statePageLoadStates[index].loaded) {
+                        return statePageLoadStates;
+                    }
+
+                    return statePageLoadStates.toSpliced(index, 1, { loaded: true });
+                });
             },
-            [actualPages, readingMode, pageLoadStates],
+            [actualPages, readingMode],
         );
 
         const onError = useCallback((pageIndex: number) => {