perf: Use hash map to check if path was already checked

Faster than using in_array

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

Author: CarlSchwan

lib/private/Files/Cache/Watcher.php

@@ -19,6 +19,7 @@
  */
 class Watcher implements IWatcher {
 	protected int $watchPolicy = self::CHECK_ONCE;
+	/** @var array<string, true> $checkedPaths */
 	protected array $checkedPaths = [];
 	protected ICache $cache;
 	protected IScanner $scanner;
@@ -121,8 +122,8 @@ public function needsUpdate($path, $cachedData) {
 			}
 		}
 
-		if ($this->watchPolicy === self::CHECK_ALWAYS || ($this->watchPolicy === self::CHECK_ONCE && !in_array($path, $this->checkedPaths))) {
-			$this->checkedPaths[] = $path;
+		if ($this->watchPolicy === self::CHECK_ALWAYS || ($this->watchPolicy === self::CHECK_ONCE && !isset($this->checkedPaths[$path]))) {
+			$this->checkedPaths[$path] = true;
 			return $cachedData['storage_mtime'] === null || $this->storage->hasUpdated($path, $cachedData['storage_mtime']);
 		}
 		return false;