diff --git a/conf/config.neon b/conf/config.neon
index f623528506a..b31c9dd4a14 100644
--- a/conf/config.neon
+++ b/conf/config.neon
@@ -146,6 +146,7 @@ parameters:
 		phpStormStubsNodesCountMax: 128
 		memberCacheKeysMax: 2048
 		resolvedLocalTypeAliasesCountMax: 2048
+		parsedPhpDocCountMax: 1024
 	reportUnmatchedIgnoredErrors: true
 	reportIgnoresWithoutComments: false
 	typeAliases: []
diff --git a/conf/parametersSchema.neon b/conf/parametersSchema.neon
index 154054ccb1f..fce20ad82fe 100644
--- a/conf/parametersSchema.neon
+++ b/conf/parametersSchema.neon
@@ -164,7 +164,8 @@ parametersSchema:
 		nameScopeMapMemoryCacheCountMax: int(),
 		phpStormStubsNodesCountMax: int(),
 		memberCacheKeysMax: int(),
-		resolvedLocalTypeAliasesCountMax: int()
+		resolvedLocalTypeAliasesCountMax: int(),
+		parsedPhpDocCountMax: int()
 	])
 	reportUnmatchedIgnoredErrors: bool()
 	reportIgnoresWithoutComments: bool()
diff --git a/src/PhpDoc/PhpDocStringResolver.php b/src/PhpDoc/PhpDocStringResolver.php
index 30a6e1df0e6..03fb1941787 100644
--- a/src/PhpDoc/PhpDocStringResolver.php
+++ b/src/PhpDoc/PhpDocStringResolver.php
@@ -2,7 +2,9 @@
 
 namespace PHPStan\PhpDoc;
 
+use PHPStan\DependencyInjection\AutowiredParameter;
 use PHPStan\DependencyInjection\AutowiredService;
+use PHPStan\Internal\LruCache;
 use PHPStan\PhpDocParser\Ast\PhpDoc\PhpDocNode;
 use PHPStan\PhpDocParser\Lexer\Lexer;
 use PHPStan\PhpDocParser\Parser\PhpDocParser;
@@ -12,16 +14,37 @@
 final class PhpDocStringResolver
 {
 
-	public function __construct(private Lexer $phpDocLexer, private PhpDocParser $phpDocParser)
+	/**
+	 * FileTypeMapper and the rules that validate PHPDocs parse the same strings, often one right after
+	 * another. The parsed nodes are not modified afterwards, so equal strings can share one node.
+	 *
+	 * @var LruCache<PhpDocNode>
+	 */
+	private LruCache $parsedPhpDocs;
+
+	public function __construct(
+		private Lexer $phpDocLexer,
+		private PhpDocParser $phpDocParser,
+		#[AutowiredParameter(ref: '%cache.parsedPhpDocCountMax%')]
+		int $parsedPhpDocCountMax,
+	)
 	{
+		$this->parsedPhpDocs = new LruCache($parsedPhpDocCountMax);
 	}
 
 	public function resolve(string $phpDocString): PhpDocNode
 	{
+		$phpDocNode = $this->parsedPhpDocs->get($phpDocString);
+		if ($phpDocNode !== null) {
+			return $phpDocNode;
+		}
+
 		$tokens = new TokenIterator($this->phpDocLexer->tokenize($phpDocString));
 		$phpDocNode = $this->phpDocParser->parse($tokens);
 		$tokens->consumeTokenType(Lexer::TOKEN_END); // @phpstan-ignore missingType.checkedException
 
+		$this->parsedPhpDocs->set($phpDocString, $phpDocNode, 0);
+
 		return $phpDocNode;
 	}
 
diff --git a/src/Rules/PhpDoc/InvalidPHPStanDocTagRule.php b/src/Rules/PhpDoc/InvalidPHPStanDocTagRule.php
index e7f58e41bbc..73922ec0566 100644
--- a/src/Rules/PhpDoc/InvalidPHPStanDocTagRule.php
+++ b/src/Rules/PhpDoc/InvalidPHPStanDocTagRule.php
@@ -8,9 +8,7 @@
 use PHPStan\DependencyInjection\RegisteredRule;
 use PHPStan\DependencyInjection\ValidatesStubFiles;
 use PHPStan\Node\VirtualNode;
-use PHPStan\PhpDocParser\Lexer\Lexer;
-use PHPStan\PhpDocParser\Parser\PhpDocParser;
-use PHPStan\PhpDocParser\Parser\TokenIterator;
+use PHPStan\PhpDoc\PhpDocStringResolver;
 use PHPStan\Rules\MultipleNodeTypesRule;
 use PHPStan\Rules\RuleErrorBuilder;
 use function in_array;
@@ -70,10 +68,7 @@ final class InvalidPHPStanDocTagRule implements MultipleNodeTypesRule
 		'@phpstan-all-methods-impure',
 	];
 
-	public function __construct(
-		private Lexer $phpDocLexer,
-		private PhpDocParser $phpDocParser,
-	)
+	public function __construct(private PhpDocStringResolver $phpDocStringResolver)
 	{
 	}
 
@@ -111,8 +106,7 @@ public function processNode(Node $node, Scope $scope): array
 			return [];
 		}
 		$phpDocString = $docComment->getText();
-		$tokens = new TokenIterator($this->phpDocLexer->tokenize($phpDocString));
-		$phpDocNode = $this->phpDocParser->parse($tokens);
+		$phpDocNode = $this->phpDocStringResolver->resolve($phpDocString);
 
 		$errors = [];
 		foreach ($phpDocNode->getTags() as $phpDocTag) {
diff --git a/src/Rules/PhpDoc/InvalidPhpDocTagValueRule.php b/src/Rules/PhpDoc/InvalidPhpDocTagValueRule.php
index bf1cbd4c796..8d96606409b 100644
--- a/src/Rules/PhpDoc/InvalidPhpDocTagValueRule.php
+++ b/src/Rules/PhpDoc/InvalidPhpDocTagValueRule.php
@@ -8,12 +8,10 @@
 use PHPStan\DependencyInjection\RegisteredRule;
 use PHPStan\DependencyInjection\ValidatesStubFiles;
 use PHPStan\Node\VirtualNode;
+use PHPStan\PhpDoc\PhpDocStringResolver;
 use PHPStan\PhpDocParser\Ast\PhpDoc\InvalidTagValueNode;
 use PHPStan\PhpDocParser\Ast\PhpDoc\TypeAliasTagValueNode;
 use PHPStan\PhpDocParser\Ast\Type\InvalidTypeNode;
-use PHPStan\PhpDocParser\Lexer\Lexer;
-use PHPStan\PhpDocParser\Parser\PhpDocParser;
-use PHPStan\PhpDocParser\Parser\TokenIterator;
 use PHPStan\Rules\MultipleNodeTypesRule;
 use PHPStan\Rules\RuleErrorBuilder;
 use function sprintf;
@@ -27,10 +25,7 @@
 final class InvalidPhpDocTagValueRule implements MultipleNodeTypesRule
 {
 
-	public function __construct(
-		private Lexer $phpDocLexer,
-		private PhpDocParser $phpDocParser,
-	)
+	public function __construct(private PhpDocStringResolver $phpDocStringResolver)
 	{
 	}
 
@@ -69,8 +64,7 @@ public function processNode(Node $node, Scope $scope): array
 		}
 
 		$phpDocString = $docComment->getText();
-		$tokens = new TokenIterator($this->phpDocLexer->tokenize($phpDocString));
-		$phpDocNode = $this->phpDocParser->parse($tokens);
+		$phpDocNode = $this->phpDocStringResolver->resolve($phpDocString);
 
 		$errors = [];
 		foreach ($phpDocNode->getTags() as $phpDocTag) {
diff --git a/tests/PHPStan/PhpDoc/PhpDocStringResolverTest.php b/tests/PHPStan/PhpDoc/PhpDocStringResolverTest.php
index ba59b491888..83283aee119 100644
--- a/tests/PHPStan/PhpDoc/PhpDocStringResolverTest.php
+++ b/tests/PHPStan/PhpDoc/PhpDocStringResolverTest.php
@@ -2,7 +2,9 @@
 
 namespace PHPStan\PhpDoc;
 
+use PHPStan\PhpDocParser\Lexer\Lexer;
 use PHPStan\PhpDocParser\Parser\ParserException;
+use PHPStan\PhpDocParser\Parser\PhpDocParser;
 use PHPStan\Testing\PHPStanTestCase;
 
 class PhpDocStringResolverTest extends PHPStanTestCase
@@ -17,4 +19,24 @@ public function testConsumeEnd(): void
 		$phpDocStringResolver->resolve('/** @param int $test */  test');
 	}
 
+	public function testEqualStringsShareOneNode(): void
+	{
+		$phpDocStringResolver = $this->createPhpDocStringResolver();
+
+		$node = $phpDocStringResolver->resolve('/** @param int $test */');
+		$this->assertSame($node, $phpDocStringResolver->resolve('/** @param int $test */'));
+		$this->assertNotSame($node, $phpDocStringResolver->resolve('/** @param string $test */'));
+	}
+
+	private function createPhpDocStringResolver(): PhpDocStringResolver
+	{
+		$container = self::getContainer();
+
+		return new PhpDocStringResolver(
+			$container->getByType(Lexer::class),
+			$container->getByType(PhpDocParser::class),
+			1024,
+		);
+	}
+
 }
diff --git a/tests/PHPStan/Rules/PhpDoc/InvalidPHPStanDocTagRuleTest.php b/tests/PHPStan/Rules/PhpDoc/InvalidPHPStanDocTagRuleTest.php
index d3bab774130..5c7425f2561 100644
--- a/tests/PHPStan/Rules/PhpDoc/InvalidPHPStanDocTagRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/InvalidPHPStanDocTagRuleTest.php
@@ -2,8 +2,7 @@
 
 namespace PHPStan\Rules\PhpDoc;
 
-use PHPStan\PhpDocParser\Lexer\Lexer;
-use PHPStan\PhpDocParser\Parser\PhpDocParser;
+use PHPStan\PhpDoc\PhpDocStringResolver;
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
 use PHPUnit\Framework\Attributes\RequiresPhp;
@@ -16,10 +15,8 @@ class InvalidPHPStanDocTagRuleTest extends RuleTestCase
 
 	protected function getRule(): Rule
 	{
-		$container = self::getContainer();
 		return new InvalidPHPStanDocTagRule(
-			$container->getByType(Lexer::class),
-			$container->getByType(PhpDocParser::class),
+			self::getContainer()->getByType(PhpDocStringResolver::class),
 		);
 	}
 
diff --git a/tests/PHPStan/Rules/PhpDoc/InvalidPhpDocTagValueRuleTest.php b/tests/PHPStan/Rules/PhpDoc/InvalidPhpDocTagValueRuleTest.php
index 7010ec568fa..6b5896643bc 100644
--- a/tests/PHPStan/Rules/PhpDoc/InvalidPhpDocTagValueRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/InvalidPhpDocTagValueRuleTest.php
@@ -2,8 +2,7 @@
 
 namespace PHPStan\Rules\PhpDoc;
 
-use PHPStan\PhpDocParser\Lexer\Lexer;
-use PHPStan\PhpDocParser\Parser\PhpDocParser;
+use PHPStan\PhpDoc\PhpDocStringResolver;
 use PHPStan\Rules\Rule;
 use PHPStan\Testing\RuleTestCase;
 use PHPUnit\Framework\Attributes\RequiresPhp;
@@ -16,10 +15,8 @@ class InvalidPhpDocTagValueRuleTest extends RuleTestCase
 
 	protected function getRule(): Rule
 	{
-		$container = self::getContainer();
 		return new InvalidPhpDocTagValueRule(
-			$container->getByType(Lexer::class),
-			$container->getByType(PhpDocParser::class),
+			self::getContainer()->getByType(PhpDocStringResolver::class),
 		);
 	}