diff --git a/bench/rename_method_bucket_bench.php b/bench/rename_method_bucket_bench.php
new file mode 100644
index 00000000000..f84927ee9dc
--- /dev/null
+++ b/bench/rename_method_bucket_bench.php
@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Benchmark for RenameMethodRector.
+ *
+ * The rule is configured with a list of method renames. For every method/static call node it used
+ * to scan the whole list, running isStringName() on each entry before the expensive type/reflection
+ * checks. With a large configured list (symfony/doctrine sets ship hundreds) this is a per-node
+ * linear scan whose cost is pure string comparison self time.
+ *
+ * The change buckets the renames by lowercased old-method name at configure() time, so a node only
+ * looks at the few renames sharing its name - one hash lookup instead of N isStringName() calls.
+ *
+ * This bench configures the rule with many renames, then drives refactor() over many calls whose
+ * names are NOT in the map (the common case), isolating the scan cost from type resolution.
+ *
+ * Run on both branches to compare:
+ *   php bench/rename_method_bucket_bench.php
+ *
+ * Reports CPU time (user+sys) and wall time; CPU is the reliable metric, wall is noisy under
+ * concurrent load.
+ */
+
+use PhpParser\Node\Expr\MethodCall;
+use Rector\DependencyInjection\LazyContainerFactory;
+use Rector\PhpParser\Node\BetterNodeFinder;
+use Rector\Renaming\Rector\MethodCall\RenameMethodRector;
+use Rector\Renaming\ValueObject\MethodCallRename;
+use Rector\Testing\TestingParser\TestingParser;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+const RENAMES = 400; // configured method renames
+const CALLS = 200;   // method calls per pass, names not in the map
+const REPEAT = 200;  // outer repeats over the whole set
+
+$rectorConfig = (new LazyContainerFactory())->create();
+$rectorConfig->boot();
+
+/** @var TestingParser $testingParser */
+$testingParser = $rectorConfig->make(TestingParser::class);
+
+/** @var BetterNodeFinder $betterNodeFinder */
+$betterNodeFinder = $rectorConfig->make(BetterNodeFinder::class);
+
+$rector = $rectorConfig->make(RenameMethodRector::class);
+
+$methodCallRenames = [];
+for ($i = 0; $i < RENAMES; ++$i) {
+    $methodCallRenames[] = new MethodCallRename('Bench\\SomeClass' . $i, 'oldMethod' . $i, 'newMethod' . $i);
+}
+
+$rector->configure($methodCallRenames);
+
+$source = "<?php\n\nnamespace Bench;\n\n\$value = new Other();\n";
+for ($i = 0; $i < CALLS; ++$i) {
+    // names deliberately absent from the configured renames
+    $source .= "\$value->freshCall{$i}();\n";
+}
+
+$sourceFilePath = tempnam(sys_get_temp_dir(), 'bench_') . '.php';
+file_put_contents($sourceFilePath, $source);
+
+$stmts = $testingParser->parseFileToDecoratedNodes($sourceFilePath);
+
+/** @var MethodCall[] $methodCalls */
+$methodCalls = $betterNodeFinder->findInstanceOf($stmts, MethodCall::class);
+
+$cpuSeconds = static function (): float {
+    $usage = getrusage();
+    return $usage['ru_utime.tv_sec'] + $usage['ru_utime.tv_usec'] / 1_000_000
+        + $usage['ru_stime.tv_sec'] + $usage['ru_stime.tv_usec'] / 1_000_000;
+};
+
+$run = static function () use ($rector, $methodCalls): void {
+    foreach ($methodCalls as $methodCall) {
+        $rector->refactor($methodCall);
+    }
+};
+
+// warm up autoloading/reflection caches once, excluded from timing
+$run();
+
+$wallStart = microtime(true);
+$cpuStart = $cpuSeconds();
+
+for ($repeat = 0; $repeat < REPEAT; ++$repeat) {
+    $run();
+}
+
+$cpu = $cpuSeconds() - $cpuStart;
+$wall = microtime(true) - $wallStart;
+
+@unlink($sourceFilePath);
+
+$totalCalls = REPEAT * count($methodCalls);
+
+printf('renames: %d, calls: %d, repeats: %d, refactor() calls: %d%s', RENAMES, count($methodCalls), REPEAT, $totalCalls, PHP_EOL);
+printf('CPU:  %.4f s  (%.3f us/call)%s', $cpu, $cpu / $totalCalls * 1_000_000, PHP_EOL);
+printf('wall: %.4f s%s', $wall, PHP_EOL);
diff --git a/rules/Renaming/Rector/MethodCall/RenameMethodRector.php b/rules/Renaming/Rector/MethodCall/RenameMethodRector.php
index c19990bc79b..9d77fc9f192 100644
--- a/rules/Renaming/Rector/MethodCall/RenameMethodRector.php
+++ b/rules/Renaming/Rector/MethodCall/RenameMethodRector.php
@@ -36,9 +36,9 @@
 final class RenameMethodRector extends AbstractRector implements ConfigurableRectorInterface
 {
     /**
-     * @var MethodCallRenameInterface[]
+     * @var array<string, MethodCallRenameInterface[]>
      */
-    private array $methodCallRenames = [];
+    private array $methodCallRenamesByOldMethod = [];
 
     public function __construct(
         private readonly ClassManipulator $classManipulator,
@@ -101,7 +101,12 @@ public function configure(array $configuration): void
     {
         Assert::allIsAOf($configuration, MethodCallRenameInterface::class);
 
-        $this->methodCallRenames = $configuration;
+        // bucket by old method name, so a node matches only the few renames sharing its name,
+        // instead of scanning the whole configured list per node
+        $this->methodCallRenamesByOldMethod = [];
+        foreach ($configuration as $methodCallRename) {
+            $this->methodCallRenamesByOldMethod[strtolower($methodCallRename->getOldMethod())][] = $methodCallRename;
+        }
     }
 
     private function shouldSkipClassMethod(
@@ -176,7 +181,7 @@ private function refactorClass(
                 continue;
             }
 
-            foreach ($this->methodCallRenames as $methodCallRename) {
+            foreach ($this->methodCallRenamesByOldMethod[strtolower($methodName)] ?? [] as $methodCallRename) {
                 if ($this->shouldSkipRename(
                     $methodName,
                     $classMethod,
@@ -238,7 +243,7 @@ private function refactorMethodCallAndStaticCall(
             return null;
         }
 
-        foreach ($this->methodCallRenames as $methodCallRename) {
+        foreach ($this->methodCallRenamesByOldMethod[strtolower($callName)] ?? [] as $methodCallRename) {
             if (! $this->nodeNameResolver->isStringName($callName, $methodCallRename->getOldMethod())) {
                 continue;
             }
diff --git a/src/BetterPhpDocParser/PhpDocManipulator/PhpDocClassRenamer.php b/src/BetterPhpDocParser/PhpDocManipulator/PhpDocClassRenamer.php
index 88fc559a1aa..0ebccb4244d 100644
--- a/src/BetterPhpDocParser/PhpDocManipulator/PhpDocClassRenamer.php
+++ b/src/BetterPhpDocParser/PhpDocManipulator/PhpDocClassRenamer.php
@@ -16,11 +16,16 @@
 use Rector\Enum\ClassName;
 use Rector\Renaming\Collector\RenamedNameCollector;
 
-final readonly class PhpDocClassRenamer
+final class PhpDocClassRenamer
 {
+    /**
+     * @var array<string, string>
+     */
+    private array $wordBoundaryPatternByOldClass = [];
+
     public function __construct(
-        private ClassAnnotationMatcher $classAnnotationMatcher,
-        private RenamedNameCollector $renamedNameCollector
+        private readonly ClassAnnotationMatcher $classAnnotationMatcher,
+        private readonly RenamedNameCollector $renamedNameCollector
     ) {
     }
 
@@ -130,6 +135,12 @@ private function processSerializerTypeTagValueNode(
 
         $classNameArrayItemNode = $doctrineAnnotationTagValueNode->getSilentValue();
 
+        // loop-invariant, resolve once instead of per configured class
+        $currentTypeArrayItemNode = $doctrineAnnotationTagValueNode->getValue('type');
+        $currentTypeStringNode = $currentTypeArrayItemNode instanceof ArrayItemNode
+            ? $currentTypeArrayItemNode->value
+            : null;
+
         foreach ($oldToNewClasses as $oldClass => $newClass) {
             if ($classNameArrayItemNode instanceof ArrayItemNode && $classNameArrayItemNode->value instanceof StringNode) {
                 $classNameStringNode = $classNameArrayItemNode->value;
@@ -142,7 +153,7 @@ private function processSerializerTypeTagValueNode(
                 $this->renamedNameCollector->add($oldClass);
                 $classNameStringNode->value = Strings::replace(
                     $classNameStringNode->value,
-                    '#\b' . preg_quote($oldClass, '#') . '\b#',
+                    $this->wordBoundaryPatternByOldClass[$oldClass] ??= '#\b' . preg_quote($oldClass, '#') . '\b#',
                     $newClass
                 );
 
@@ -151,17 +162,7 @@ private function processSerializerTypeTagValueNode(
                 $hasChanged = true;
             }
 
-            $currentTypeArrayItemNode = $doctrineAnnotationTagValueNode->getValue('type');
-            if (! $currentTypeArrayItemNode instanceof ArrayItemNode) {
-                continue;
-            }
-
-            $currentTypeStringNode = $currentTypeArrayItemNode->value;
-            if (! $currentTypeStringNode instanceof StringNode) {
-                continue;
-            }
-
-            if ($currentTypeStringNode->value === $oldClass) {
+            if ($currentTypeStringNode instanceof StringNode && $currentTypeStringNode->value === $oldClass) {
                 $currentTypeStringNode->value = $newClass;
 
                 $hasChanged = true;
diff --git a/src/NodeTypeResolver/PhpDoc/NodeAnalyzer/DocBlockClassRenamer.php b/src/NodeTypeResolver/PhpDoc/NodeAnalyzer/DocBlockClassRenamer.php
index 3f1432aa119..9a03e1141f3 100644
--- a/src/NodeTypeResolver/PhpDoc/NodeAnalyzer/DocBlockClassRenamer.php
+++ b/src/NodeTypeResolver/PhpDoc/NodeAnalyzer/DocBlockClassRenamer.php
@@ -12,9 +12,14 @@
 
 final readonly class DocBlockClassRenamer
 {
+    private PhpDocNodeTraverser $phpDocNodeTraverser;
+
     public function __construct(
         private ClassRenamePhpDocNodeVisitor $classRenamePhpDocNodeVisitor,
     ) {
+        // the traverser + visitor are reusable across calls, so build them once
+        $this->phpDocNodeTraverser = new PhpDocNodeTraverser();
+        $this->phpDocNodeTraverser->addPhpDocNodeVisitor($this->classRenamePhpDocNodeVisitor);
     }
 
     /**
@@ -26,14 +31,11 @@ public function renamePhpDocType(PhpDocInfo $phpDocInfo, array $oldToNewTypes, N
             return false;
         }
 
-        $phpDocNodeTraverser = new PhpDocNodeTraverser();
-        $phpDocNodeTraverser->addPhpDocNodeVisitor($this->classRenamePhpDocNodeVisitor);
-
         $this->classRenamePhpDocNodeVisitor->setCurrentPhpNode($currentPhpNode);
 
         $this->classRenamePhpDocNodeVisitor->setOldToNewTypes($oldToNewTypes);
 
-        $phpDocNodeTraverser->traverse($phpDocInfo->getPhpDocNode());
+        $this->phpDocNodeTraverser->traverse($phpDocInfo->getPhpDocNode());
 
         return $this->classRenamePhpDocNodeVisitor->hasChanged();
     }