diff --git a/src/Parser/CachedParser.php b/src/Parser/CachedParser.php
index 400c21bf5a..98a8dbb854 100644
--- a/src/Parser/CachedParser.php
+++ b/src/Parser/CachedParser.php
@@ -14,8 +14,10 @@ final class CachedParser implements Parser
 
 	private int $cachedNodesByStringCount = 0;
 
-	/** @var array<string, true> */
-	private array $parsedByString = [];
+	/** @var array<string, Node\Stmt[]>*/
+	private array $cachedNodesByFile = [];
+
+	private int $cachedNodesByFileCount = 0;
 
 	public function __construct(
 		private Parser $originalParser,
@@ -30,24 +32,22 @@ public function __construct(
 	 */
 	public function parseFile(string $file): array
 	{
-		if ($this->cachedNodesByStringCountMax !== 0 && $this->cachedNodesByStringCount >= $this->cachedNodesByStringCountMax) {
-			$this->cachedNodesByString = array_slice(
-				$this->cachedNodesByString,
+		if ($this->cachedNodesByFileCount !== 0 && $this->cachedNodesByFileCount >= $this->cachedNodesByStringCountMax) {
+			$this->cachedNodesByFile = array_slice(
+				$this->cachedNodesByFile,
 				1,
 				preserve_keys: true,
 			);
 
-			--$this->cachedNodesByStringCount;
+			--$this->cachedNodesByFileCount;
 		}
 
-		$sourceCode = FileReader::read($file);
-		if (!isset($this->cachedNodesByString[$sourceCode]) || isset($this->parsedByString[$sourceCode])) {
-			$this->cachedNodesByString[$sourceCode] = $this->originalParser->parseFile($file);
-			$this->cachedNodesByStringCount++;
-			unset($this->parsedByString[$sourceCode]);
+		if (!isset($this->cachedNodesByFile[$file])) {
+			$this->cachedNodesByFile[$file] = $this->originalParser->parseFile($file);
+			$this->cachedNodesByFileCount++;
 		}
 
-		return $this->cachedNodesByString[$sourceCode];
+		return $this->cachedNodesByFile[$file];
 	}
 
 	/**
@@ -68,7 +68,6 @@ public function parseString(string $sourceCode): array
 		if (!isset($this->cachedNodesByString[$sourceCode])) {
 			$this->cachedNodesByString[$sourceCode] = $this->originalParser->parseString($sourceCode);
 			$this->cachedNodesByStringCount++;
-			$this->parsedByString[$sourceCode] = true;
 		}
 
 		return $this->cachedNodesByString[$sourceCode];