diff --git a/src/Internal/ComposerHelper.php b/src/Internal/ComposerHelper.php
index 6a5f518197..b771d87fb6 100644
--- a/src/Internal/ComposerHelper.php
+++ b/src/Internal/ComposerHelper.php
@@ -23,6 +23,8 @@ final class ComposerHelper
 
 	private static ?string $betterReflectionVersion = null;
 
+	private static ?string $phpstomStubsVersion = null;
+
 	private static ?string $phpDocParserVersion = null;
 
 	/** @var array<string, mixed[]> */
@@ -124,6 +126,21 @@ public static function getBetterReflectionVersion(): string
 		return self::$betterReflectionVersion = self::processPackageVersion($rootPackage);
 	}
 
+	public static function getPhpStormStubsVersion(): string
+	{
+		if (self::$phpstomStubsVersion !== null) {
+			return self::$phpstomStubsVersion;
+		}
+
+		$installed = self::getInstalled();
+		$rootPackage = $installed['versions']['jetbrains/phpstorm-stubs'] ?? null;
+		if ($rootPackage === null) {
+			return self::$phpstomStubsVersion = self::UNKNOWN_VERSION;
+		}
+
+		return self::$phpstomStubsVersion = self::processPackageVersion($rootPackage);
+	}
+
 	public static function getPhpDocParserVersion(): string
 	{
 		if (self::$phpDocParserVersion !== null) {
diff --git a/src/Reflection/BetterReflection/BetterReflectionSourceLocatorFactory.php b/src/Reflection/BetterReflection/BetterReflectionSourceLocatorFactory.php
index ddffaffc89..1cee568775 100644
--- a/src/Reflection/BetterReflection/BetterReflectionSourceLocatorFactory.php
+++ b/src/Reflection/BetterReflection/BetterReflectionSourceLocatorFactory.php
@@ -13,6 +13,7 @@
 use PHPStan\BetterReflection\SourceLocator\Type\MemoizingSourceLocator;
 use PHPStan\BetterReflection\SourceLocator\Type\PhpInternalSourceLocator;
 use PHPStan\BetterReflection\SourceLocator\Type\SourceLocator;
+use PHPStan\Cache\Cache;
 use PHPStan\DependencyInjection\AutowiredParameter;
 use PHPStan\DependencyInjection\AutowiredService;
 use PHPStan\Php\PhpVersion;
@@ -28,6 +29,7 @@
 use PHPStan\Reflection\BetterReflection\SourceLocator\RewriteClassAliasSourceLocator;
 use PHPStan\Reflection\BetterReflection\SourceLocator\SkipClassAliasSourceLocator;
 use PHPStan\Reflection\BetterReflection\SourceLocator\SkipPolyfillSourceLocator;
+use PHPStan\Reflection\BetterReflection\SourceStubber\CachedPhpStormStubsSourceStubber;
 use function array_merge;
 use function array_unique;
 use function count;
@@ -74,6 +76,7 @@ public function __construct(
 		private bool $playgroundMode, // makes all PHPStan classes in the PHAR discoverable with PSR-4
 		#[AutowiredParameter]
 		private ?string $singleReflectionFile,
+		private Cache $cache,
 	)
 	{
 	}
@@ -160,13 +163,18 @@ public function create(): SourceLocator
 				);
 			}
 		}
+		$cachedPhpstormSourceStubber = new CachedPhpStormStubsSourceStubber(
+			$this->phpstormStubsSourceStubber,
+			$this->cache,
+			$this->phpVersion,
+		);
 
 		$locators[] = new RewriteClassAliasSourceLocator(new AggregateSourceLocator($fileLocators));
-		$locators[] = new SkipClassAliasSourceLocator(new PhpInternalSourceLocator($astPhp8Locator, $this->phpstormStubsSourceStubber));
+		$locators[] = new SkipClassAliasSourceLocator(new PhpInternalSourceLocator($astPhp8Locator, $cachedPhpstormSourceStubber));
 
 		$locators[] = new AutoloadSourceLocator($this->fileNodesFetcher, true);
-		$locators[] = new PhpVersionBlacklistSourceLocator(new PhpInternalSourceLocator($astLocator, $this->reflectionSourceStubber), $this->phpstormStubsSourceStubber);
-		$locators[] = new PhpVersionBlacklistSourceLocator(new EvaledCodeSourceLocator($astLocator, $this->reflectionSourceStubber), $this->phpstormStubsSourceStubber);
+		$locators[] = new PhpVersionBlacklistSourceLocator(new PhpInternalSourceLocator($astLocator, $this->reflectionSourceStubber), $cachedPhpstormSourceStubber);
+		$locators[] = new PhpVersionBlacklistSourceLocator(new EvaledCodeSourceLocator($astLocator, $this->reflectionSourceStubber), $cachedPhpstormSourceStubber);
 
 		return new MemoizingSourceLocator(new AggregateSourceLocator($locators));
 	}
diff --git a/src/Reflection/BetterReflection/SourceLocator/PhpVersionBlacklistSourceLocator.php b/src/Reflection/BetterReflection/SourceLocator/PhpVersionBlacklistSourceLocator.php
index 3ff2e8cc96..5d6f36c018 100644
--- a/src/Reflection/BetterReflection/SourceLocator/PhpVersionBlacklistSourceLocator.php
+++ b/src/Reflection/BetterReflection/SourceLocator/PhpVersionBlacklistSourceLocator.php
@@ -9,13 +9,14 @@
 use PHPStan\BetterReflection\Reflector\Reflector;
 use PHPStan\BetterReflection\SourceLocator\SourceStubber\PhpStormStubsSourceStubber;
 use PHPStan\BetterReflection\SourceLocator\Type\SourceLocator;
+use PHPStan\Reflection\BetterReflection\SourceStubber\CachedPhpStormStubsSourceStubber;
 
 final class PhpVersionBlacklistSourceLocator implements SourceLocator
 {
 
 	public function __construct(
 		private SourceLocator $sourceLocator,
-		private PhpStormStubsSourceStubber $phpStormStubsSourceStubber,
+		private PhpStormStubsSourceStubber|CachedPhpStormStubsSourceStubber $phpStormStubsSourceStubber,
 	)
 	{
 	}
diff --git a/src/Reflection/BetterReflection/SourceStubber/CachedPhpStormStubsSourceStubber.php b/src/Reflection/BetterReflection/SourceStubber/CachedPhpStormStubsSourceStubber.php
new file mode 100644
index 0000000000..4eaba77695
--- /dev/null
+++ b/src/Reflection/BetterReflection/SourceStubber/CachedPhpStormStubsSourceStubber.php
@@ -0,0 +1,101 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Reflection\BetterReflection\SourceStubber;
+
+use PHPStan\BetterReflection\SourceLocator\SourceStubber\PhpStormStubsSourceStubber;
+use PHPStan\BetterReflection\SourceLocator\SourceStubber\SourceStubber;
+use PHPStan\BetterReflection\SourceLocator\SourceStubber\StubData;
+use PHPStan\Cache\Cache;
+use PHPStan\Internal\ComposerHelper;
+use PHPStan\Php\PhpVersion;
+use function array_key_exists;
+use function sprintf;
+
+final class CachedPhpStormStubsSourceStubber implements SourceStubber
+{
+
+	/** @var array<string, mixed> */
+	private array $cached;
+
+	public function __construct(
+		private PhpStormStubsSourceStubber $sourceStubber,
+		private Cache $cache,
+		private PhpVersion $phpVersion,
+	)
+	{
+		[$cacheKey, $variableCacheKey] = $this->getCacheKeys();
+		$this->cached = $this->cache->load($cacheKey, $variableCacheKey) ?? [];
+	}
+
+	/**
+	 * @return array{non-empty-string, string}
+	 */
+	private function getCacheKeys(): array
+	{
+		$stubsVersion = ComposerHelper::getPhpStormStubsVersion();
+		$cacheKey = sprintf('phpstorm-stubs-%s', $stubsVersion);
+		$variableCacheKey = sprintf('v1-%s-%s', ComposerHelper::getBetterReflectionVersion(), $this->phpVersion->getVersionString());
+
+		return [$cacheKey, $variableCacheKey];
+	}
+
+	#[\Override]
+	public function generateClassStub(string $className): ?StubData
+	{
+		$this->cached['classes'] ??= [];
+		if (!array_key_exists($className, $this->cached['classes'])) {
+			$this->cached['classes'][$className] = $this->sourceStubber->generateClassStub($className);
+			$this->storeCache();
+		}
+		return $this->cached['classes'][$className];
+	}
+
+	#[\Override]
+	public function generateFunctionStub(string $functionName): ?StubData
+	{
+		$this->cached['functions'] ??= [];
+		if (!array_key_exists($functionName, $this->cached['functions'])) {
+			$this->cached['functions'][$functionName] = $this->sourceStubber->generateFunctionStub($functionName);
+			$this->storeCache();
+		}
+		return $this->cached['functions'][$functionName];
+	}
+
+	#[\Override]
+	public function generateConstantStub(string $constantName): ?StubData
+	{
+		$this->cached['constants'] ??= [];
+		if (!array_key_exists($constantName, $this->cached['constants'])) {
+			$this->cached['constants'][$constantName] = $this->sourceStubber->generateConstantStub($constantName);
+			$this->storeCache();
+		}
+		return $this->cached['constants'][$constantName];
+	}
+
+	public function isPresentClass(string $className): ?bool
+	{
+		$this->cached['isPresentClass'] ??= [];
+		if (!array_key_exists($className, $this->cached['isPresentClass'])) {
+			$this->cached['isPresentClass'][$className] = $this->sourceStubber->isPresentClass($className);
+			$this->storeCache();
+		}
+		return $this->cached['isPresentClass'][$className];
+	}
+
+	public function isPresentFunction(string $functionName): ?bool
+	{
+		$this->cached['isPresentFunction'] ??= [];
+		if (!array_key_exists($functionName, $this->cached['isPresentFunction'])) {
+			$this->cached['isPresentFunction'][$functionName] = $this->sourceStubber->isPresentFunction($functionName);
+			$this->storeCache();
+		}
+		return $this->cached['isPresentFunction'][$functionName];
+	}
+
+	private function storeCache(): void
+	{
+		[$cacheKey, $variableCacheKey] = $this->getCacheKeys();
+		$this->cache->save($cacheKey, $variableCacheKey, $this->cached);
+	}
+
+}