[DependencyInjection] perf optim: call dirname() at most 5x

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -104,17 +104,19 @@ class PhpDumper extends Dumper
         ), $options);
 
         if (!empty($options['file']) && is_dir($dir = dirname($options['file']))) {
-            // Build a regexp where the first two root dirs are mandatory,
+            // Build a regexp where the first root dirs are mandatory,
             // but every other sub-dir is optional up to the full path in $dir
+            // Mandate at least 2 root dirs and not more that 5 optional dirs.
 
             $dir = explode(DIRECTORY_SEPARATOR, realpath($dir));
             $i = count($dir);
 
             if (3 <= $i) {
                 $regex = '';
-                $this->targetDirMaxMatches = $i - 3;
+                $lastOptionalDir = $i > 8 ? $i - 5 : 3;
+                $this->targetDirMaxMatches = $i - $lastOptionalDir;
 
-                while (2 < --$i) {
+                while (--$i >= $lastOptionalDir) {
                     $regex = sprintf('(%s%s)?', preg_quote(DIRECTORY_SEPARATOR.$dir[$i], '#'), $regex);
                 }
 
@@ -765,6 +767,7 @@ $bagClass
 class $class extends $baseClass
 {
     private \$parameters;
+    private \$targetDirs;
 
 EOF;
     }
@@ -777,6 +780,7 @@ EOF;
     private function addConstructor()
     {
         $parameters = $this->exportParameters($this->container->getParameterBag()->all());
+        $targetDirs = $this->exportTargetDirs();
 
         $code = <<<EOF
 
@@ -784,7 +788,7 @@ EOF;
      * Constructor.
      */
     public function __construct()
-    {
+    {{$targetDirs}
         \$this->parameters = $parameters;
 
         parent::__construct(new ParameterBag(\$this->parameters));
@@ -816,6 +820,7 @@ EOF;
     private function addFrozenConstructor()
     {
         $parameters = $this->exportParameters($this->container->getParameterBag()->all());
+        $targetDirs = $this->exportTargetDirs();
 
         $code = <<<EOF
 
@@ -823,7 +828,7 @@ EOF;
      * Constructor.
      */
     public function __construct()
-    {
+    {{$targetDirs}
         \$this->services =
         \$this->scopedServices =
         \$this->scopeStacks = array();
@@ -1335,16 +1340,28 @@ EOF;
         }
     }
 
+    private function exportTargetDirs()
+    {
+        return null === $this->targetDirRegex ? '' : <<<EOF
+
+        \$dir = __DIR__;
+        for (\$i = 1; \$i <= {$this->targetDirMaxMatches}; ++\$i) {
+            \$this->targetDirs[\$i] = \$dir = dirname(\$dir);
+        }
+EOF;
+    }
+
     private function export($value)
     {
         if (null !== $this->targetDirRegex && is_string($value) && preg_match($this->targetDirRegex, $value, $matches, PREG_OFFSET_CAPTURE)) {
             $prefix = $matches[0][1] ? var_export(substr($value, 0, $matches[0][1]), true).'.' : '';
             $suffix = $matches[0][1] + strlen($matches[0][0]);
             $suffix = isset($value[$suffix]) ? '.'.var_export(substr($value, $suffix), true) : '';
-            $dirname = '__DIR__';
 
-            for ($i = $this->targetDirMaxMatches - count($matches); 0 <= $i; --$i) {
-                $dirname = sprintf('dirname(%s)', $dirname);
+            if (0 < $dirname = 1 + $this->targetDirMaxMatches - count($matches)) {
+                $dirname = sprintf('$this->targetDirs[%d]', $dirname);
+            } else {
+                $dirname = '__DIR__';
             }
 
             if ($prefix || $suffix) {

src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php

@@ -70,13 +70,14 @@ class PhpDumperTest extends \PHPUnit_Framework_TestCase
         $definition = new Definition();
         $definition->setClass('stdClass');
         $definition->addArgument('%foo%');
-        $definition->addArgument(array('%foo%' => '%foo%'));
+        $definition->addArgument(array('%foo%' => '%buz%/'));
 
         $container = new ContainerBuilder();
         $container->setDefinition('test', $definition);
         $container->setParameter('foo', 'wiz'.dirname(dirname(__FILE__)));
         $container->setParameter('bar', dirname(__FILE__));
         $container->setParameter('baz', '%bar%/PhpDumperTest.php');
+        $container->setParameter('buz', dirname(dirname(__DIR__)));
         $container->compile();
 
         $dumper = new PhpDumper($container);

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 class Container extends AbstractContainer
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php

@@ -17,19 +17,25 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.
      */
     public function __construct()
     {
+        $dir = __DIR__;
+        for ($i = 1; $i <= 5; ++$i) {
+            $this->targetDirs[$i] = $dir = dirname($dir);
+        }
         $this->services =
         $this->scopedServices =
         $this->scopeStacks = array();
         $this->parameters = array(
-            'foo' => ('wiz'.dirname(__DIR__)),
+            'foo' => ('wiz'.$this->targetDirs[1]),
             'bar' => __DIR__,
             'baz' => (__DIR__.'/PhpDumperTest.php'),
+            'buz' => $this->targetDirs[2],
         );
 
         $this->set('service_container', $this);
@@ -53,7 +59,7 @@ class ProjectServiceContainer extends Container
      */
     protected function getTestService()
     {
-        return $this->services['test'] = new \stdClass(('wiz'.dirname(__DIR__)), array(('wiz'.dirname(__DIR__)) => ('wiz'.dirname(__DIR__))));
+        return $this->services['test'] = new \stdClass(('wiz'.$this->targetDirs[1]), array(('wiz'.$this->targetDirs[1]) => ($this->targetDirs[2].'/')));
     }
 
     /**

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php

@@ -17,6 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
+    private $targetDirs;
 
     /**
      * Constructor.