Revision: 13906
          http://sourceforge.net/p/skim-app/code/13906
Author:   hofman
Date:     2023-12-16 10:18:09 +0000 (Sat, 16 Dec 2023)
Log Message:
-----------
use background queue for thumbnail generation

Modified Paths:
--------------
    trunk/SKMainWindowController.m

Modified: trunk/SKMainWindowController.m
===================================================================
--- trunk/SKMainWindowController.m      2023-12-15 15:52:13 UTC (rev 13905)
+++ trunk/SKMainWindowController.m      2023-12-16 10:18:09 UTC (rev 13906)
@@ -2874,9 +2874,8 @@
     PDFPage *page = [self pageForThumbnail:thumbnail];
     SKReadingBar *readingBar = [[[pdfView readingBar] page] isEqual:page] ? 
[pdfView readingBar] : nil;
     PDFDisplayBox box = [pdfView displayBox];
-    dispatch_queue_t queue = dispatch_get_main_queue();
     
-    dispatch_async(queue, ^{
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 
0), ^{
         NSImage *image = [page thumbnailWithSize:thumbnailCacheSize forBox:box 
readingBar:readingBar];
         [image setAccessibilityDescription:[NSString 
stringWithFormat:NSLocalizedString(@"Page %@", @""), [page displayLabel]]];
         

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