item-cache-mtime-size: add new option

config

@@ -155,6 +155,10 @@
 # Note: use only on single-instance setup, will break consistency with client in multi-instance setup
 #use_cache_subfolder_for_synctoken = False
 
+# Use last modifiction time (nanoseconds) and size (bytes) for 'item' cache instead of SHA256 (improves speed)
+# Note: check used filesystem mtime precision before enabling
+#use_mtime_and_size_for_item_cache=False
+
 # Use configured umask for folder creation (not applicable for OS Windows)
 # Useful value: 0077 | 0027 | 0007 | 0022
 #folder_umask = (system default, usual 0022)