Speedup autoloading on PHP 5.6 & 7.0+ using static arrays

.travis.yml

@@ -27,7 +27,7 @@ matrix:
 
 before_script:
     - rm -f ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini
-    - flags=""
+    - flags="--prefer-dist"
     - composer install $flags
     - bin/composer install $flags
     - git config --global user.name travis-ci

appveyor.yml

@@ -28,7 +28,7 @@ install:
     - IF %PHP%==1 echo @php %%~dp0composer.phar %%* > composer.bat
     - appveyor DownloadFile https://getcomposer.org/composer.phar
     - cd c:\projects\composer
-    - composer install --prefer-source --no-progress
+    - composer install --prefer-dist --no-progress
 
 test_script:
     - cd c:\projects\composer

src/Composer/Autoload/AutoloadGenerator.php

@@ -285,6 +285,7 @@ EOF;
         }
         file_put_contents($vendorPath.'/autoload.php', $this->getAutoloadFile($vendorPathToTargetDirCode, $suffix));
         file_put_contents($targetDir.'/autoload_real.php', $this->getAutoloadRealFile(true, (bool) $includePathFileContents, $targetDirLoader, (bool) $includeFilesFileContents, $vendorPathCode, $appBaseDirCode, $suffix, $useGlobalIncludePath, $prependAutoloader));
+        file_put_contents($targetDir.'/autoload_static.php', $this->getStaticFile($suffix, $targetDir, $vendorPath, $basePath));
 
         $this->safeCopy(__DIR__.'/ClassLoader.php', $targetDir.'/ClassLoader.php');
         $this->safeCopy(__DIR__.'/../../../LICENSE', $targetDir.'/LICENSE');
@@ -578,17 +579,26 @@ HEADER;
 INCLUDE_PATH;
         }
 
+        $file .= <<<STATIC_INIT
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            call_user_func(\Composer\Autoload\ComposerStaticInit$suffix::getInitializer(\$loader));
+        } else {
+
+STATIC_INIT;
+
         if (!$this->classMapAuthoritative) {
             $file .= <<<'PSR04'
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
 
 
 PSR04;
@@ -596,15 +606,16 @@ PSR04;
 
         if ($useClassMap) {
             $file .= <<<'CLASSMAP'
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
-        }
-
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
 
 CLASSMAP;
         }
 
+        $file .= "        }\n\n";
+
         if ($this->classMapAuthoritative) {
             $file .= <<<'CLASSMAPAUTHORITATIVE'
         $loader->setClassMapAuthoritative(true);
@@ -635,7 +646,11 @@ REGISTER_LOADER;
 
         if ($useIncludeFiles) {
             $file .= <<<INCLUDE_FILES
-        \$includeFiles = require __DIR__ . '/autoload_files.php';
+        if (PHP_VERSION_ID >= 50600) {
+            \$includeFiles = Composer\Autoload\ComposerStaticInit$suffix::\$files;
+        } else {
+            \$includeFiles = require __DIR__ . '/autoload_files.php';
+        }
         foreach (\$includeFiles as \$fileIdentifier => \$file) {
             composerRequire$suffix(\$fileIdentifier, \$file);
         }
@@ -674,6 +689,84 @@ FOOTER;
 FOOTER;
     }
 
+    protected function getStaticFile($suffix, $targetDir, $vendorPath, $basePath)
+    {
+        $file = <<<HEADER
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInit$suffix
+{
+
+HEADER;
+
+        $loader = new ClassLoader();
+
+        $map = require $targetDir . '/autoload_namespaces.php';
+        foreach ($map as $namespace => $path) {
+            $loader->set($namespace, $path);
+        }
+
+        $map = require $targetDir . '/autoload_psr4.php';
+        foreach ($map as $namespace => $path) {
+            $loader->setPsr4($namespace, $path);
+        }
+
+        $classMap = require $targetDir . '/autoload_classmap.php';
+        if ($classMap) {
+            $loader->addClassMap($classMap);
+        }
+
+        $filesystem = new Filesystem();
+
+        $vendorPathCode = ' ' . $filesystem->findShortestPathCode(realpath($targetDir), $vendorPath, true, true) . " . '";
+        $appBaseDirCode = ' ' . $filesystem->findShortestPathCode(realpath($targetDir), $basePath, true, true) . " . '";
+
+        $absoluteVendorPathCode = ' ' . substr(var_export($vendorDir, true), 0, -1);
+        $absoluteAppBaseDirCode = ' ' . substr(var_export($baseDir, true), 0, -1);
+
+        $initializer = '';
+        $prefix = "\0Composer\Autoload\ClassLoader\0";
+        $prefixLen = strlen($prefix);
+        if (file_exists($targetDir . '/autoload_files.php')) {
+            $maps = array('files' => require $targetDir . '/autoload_files.php');
+        } else {
+            $maps = array();
+        }
+
+        foreach ((array) $loader as $prop => $value) {
+            if ($value && 0 === strpos($prop, $prefix)) {
+                $maps[substr($prop, $prefixLen)] = $value;
+            }
+        }
+
+        foreach ($maps as $prop => $value) {
+            $value = var_export($value, true);
+            $value = str_replace($absoluteVendorPathCode, $vendorPathCode, $value);
+            $value = str_replace($absoluteAppBaseDirCode, $appBaseDirCode, $value);
+            $value = ltrim(preg_replace('/^ */m', '    $0$0', $value));
+
+            $file .= sprintf("    public static $%s = %s;\n\n", $prop, $value);
+            if ('files' !== $prop) {
+                $initializer .= "            \$loader->$prop = ComposerStaticInit$suffix::\$$prop;\n";
+            }
+        }
+
+        return $file . <<<INITIALIZER
+    public static function getInitializer(ClassLoader \$loader)
+    {
+        return \Closure::bind(function () use (\$loader) {
+$initializer
+        }, null, ClassLoader::class);
+    }
+}
+
+INITIALIZER;
+    }
+
     protected function parseAutoloadsType(array $packageMap, $type, PackageInterface $mainPackage)
     {
         $autoloads = array();

src/Composer/Compiler.php

@@ -133,6 +133,7 @@ class Compiler
         $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/autoload_classmap.php'));
         $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/autoload_files.php'));
         $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/autoload_real.php'));
+        $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/autoload_static.php'));
         if (file_exists(__DIR__.'/../../vendor/composer/include_paths.php')) {
             $this->addFile($phar, new \SplFileInfo(__DIR__.'/../../vendor/composer/include_paths.php'));
         }

src/Composer/Util/Filesystem.php

@@ -358,10 +358,11 @@ class Filesystem
      * @param  string                    $from
      * @param  string                    $to
      * @param  bool                      $directories if true, the source/target are considered to be directories
+     * @param  bool                      $staticCode
      * @throws \InvalidArgumentException
      * @return string
      */
-    public function findShortestPathCode($from, $to, $directories = false)
+    public function findShortestPathCode($from, $to, $directories = false, $staticCode = false)
     {
         if (!$this->isAbsolutePath($from) || !$this->isAbsolutePath($to)) {
             throw new \InvalidArgumentException(sprintf('$from (%s) and $to (%s) must be absolute paths.', $from, $to));
@@ -388,7 +389,11 @@ class Filesystem
             return '__DIR__ . '.var_export(substr($to, strlen($from)), true);
         }
         $sourcePathDepth = substr_count(substr($from, strlen($commonPath)), '/') + $directories;
-        $commonPathCode = str_repeat('dirname(', $sourcePathDepth).'__DIR__'.str_repeat(')', $sourcePathDepth);
+        if ($staticCode) {
+            $commonPathCode = "__DIR__ . '".str_repeat('/..', $sourcePathDepth)."'";
+        } else {
+            $commonPathCode = str_repeat('dirname(', $sourcePathDepth).'__DIR__'.str_repeat(')', $sourcePathDepth);
+        }
         $relTarget = substr($to, strlen($commonPath));
 
         return $commonPathCode . (strlen($relTarget) ? '.' . var_export('/' . $relTarget, true) : '');

tests/Composer/Test/Autoload/AutoloadGeneratorTest.php

@@ -351,6 +351,7 @@ class AutoloadGeneratorTest extends TestCase
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', false, 'TargetDir');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_target_dir.php', $this->vendorDir.'/autoload.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_real_target_dir.php', $this->vendorDir.'/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__.'/Fixtures/autoload_static_target_dir.php', $this->vendorDir.'/composer/autoload_static.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_files_target_dir.php', $this->vendorDir.'/composer/autoload_files.php');
         $this->assertAutoloadFiles('classmap6', $this->vendorDir.'/composer', 'classmap');
     }
@@ -580,6 +581,7 @@ class AutoloadGeneratorTest extends TestCase
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', false, 'FilesAutoload');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_functions.php', $this->vendorDir.'/autoload.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_real_functions.php', $this->vendorDir.'/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__.'/Fixtures/autoload_static_functions.php', $this->vendorDir.'/composer/autoload_static.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_files_functions.php', $this->vendorDir.'/composer/autoload_files.php');
 
         include $this->vendorDir . '/autoload.php';
@@ -639,6 +641,7 @@ class AutoloadGeneratorTest extends TestCase
         $this->generator->dump($this->config, $this->repository, $autoloadPackage, $this->im, 'composer', false, 'FilesAutoload');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_functions.php', $this->vendorDir.'/autoload.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_real_functions_with_include_paths.php', $this->vendorDir.'/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__.'/Fixtures/autoload_static_functions_with_include_paths.php', $this->vendorDir.'/composer/autoload_static.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_files_functions.php', $this->vendorDir.'/composer/autoload_files.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/include_paths_functions.php', $this->vendorDir.'/composer/include_paths.php');
 
@@ -651,6 +654,7 @@ class AutoloadGeneratorTest extends TestCase
         $this->generator->dump($this->config, $this->repository, $notAutoloadPackage, $this->im, 'composer', false, 'FilesAutoload');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_functions.php', $this->vendorDir.'/autoload.php');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php', $this->vendorDir.'/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__.'/Fixtures/autoload_static_functions_with_removed_include_paths_and_autolad_files.php', $this->vendorDir.'/composer/autoload_static.php');
         $this->assertFileNotExists($this->vendorDir.'/composer/autoload_files.php');
         $this->assertFileNotExists($this->vendorDir.'/composer/include_paths.php');
     }
@@ -703,6 +707,7 @@ class AutoloadGeneratorTest extends TestCase
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', false, 'FilesAutoloadOrder');
         $this->assertFileEquals(__DIR__ . '/Fixtures/autoload_functions_by_dependency.php', $this->vendorDir . '/autoload.php');
         $this->assertFileEquals(__DIR__ . '/Fixtures/autoload_real_files_by_dependency.php', $this->vendorDir . '/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__ . '/Fixtures/autoload_static_files_by_dependency.php', $this->vendorDir . '/composer/autoload_static.php');
 
         require $this->vendorDir . '/autoload.php';
 
@@ -966,6 +971,7 @@ EOF;
 
         $this->generator->dump($this->config, $this->repository, $package, $this->im, 'composer', false, 'IncludePath');
         $this->assertFileEquals(__DIR__.'/Fixtures/autoload_real_include_path.php', $this->vendorDir.'/composer/autoload_real.php');
+        $this->assertFileEquals(__DIR__.'/Fixtures/autoload_static_include_path.php', $this->vendorDir.'/composer/autoload_static.php');
     }
 
     public function testVendorDirExcludedFromWorkingDir()

tests/Composer/Test/Autoload/Fixtures/autoload_real_files_by_dependency.php

@@ -23,24 +23,34 @@ class ComposerAutoloaderInitFilesAutoloadOrder
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoloadOrder', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoloadOrder::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->register(true);
 
-        $includeFiles = require __DIR__ . '/autoload_files.php';
+        if (PHP_VERSION_ID >= 50600) {
+            $includeFiles = Composer\Autoload\ComposerStaticInitFilesAutoloadOrder::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
         foreach ($includeFiles as $fileIdentifier => $file) {
             composerRequireFilesAutoloadOrder($fileIdentifier, $file);
         }

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions.php

@@ -23,24 +23,34 @@ class ComposerAutoloaderInitFilesAutoload
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->register(true);
 
-        $includeFiles = require __DIR__ . '/autoload_files.php';
+        if (PHP_VERSION_ID >= 50600) {
+            $includeFiles = Composer\Autoload\ComposerStaticInitFilesAutoload::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
         foreach ($includeFiles as $fileIdentifier => $file) {
             composerRequireFilesAutoload($fileIdentifier, $file);
         }

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_include_paths.php

@@ -27,24 +27,34 @@ class ComposerAutoloaderInitFilesAutoload
         array_push($includePaths, get_include_path());
         set_include_path(join(PATH_SEPARATOR, $includePaths));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->register(true);
 
-        $includeFiles = require __DIR__ . '/autoload_files.php';
+        if (PHP_VERSION_ID >= 50600) {
+            $includeFiles = Composer\Autoload\ComposerStaticInitFilesAutoload::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
         foreach ($includeFiles as $fileIdentifier => $file) {
             composerRequireFilesAutoload($fileIdentifier, $file);
         }

tests/Composer/Test/Autoload/Fixtures/autoload_real_functions_with_removed_include_paths_and_autolad_files.php

@@ -23,19 +23,25 @@ class ComposerAutoloaderInitFilesAutoload
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitFilesAutoload', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
-
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
-
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            \call_user_func(\Composer\Autoload\ComposerStaticInitFilesAutoload::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
+
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->register(true);

tests/Composer/Test/Autoload/Fixtures/autoload_real_include_path.php

@@ -23,19 +23,25 @@ class ComposerAutoloaderInitIncludePath
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitIncludePath', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            \call_user_func(\Composer\Autoload\ComposerStaticInitIncludePath::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         $loader->setUseIncludePath(true);

tests/Composer/Test/Autoload/Fixtures/autoload_real_target_dir.php

@@ -23,26 +23,36 @@ class ComposerAutoloaderInitTargetDir
         self::$loader = $loader = new \Composer\Autoload\ClassLoader();
         spl_autoload_unregister(array('ComposerAutoloaderInitTargetDir', 'loadClassLoader'));
 
-        $map = require __DIR__ . '/autoload_namespaces.php';
-        foreach ($map as $namespace => $path) {
-            $loader->set($namespace, $path);
-        }
+        if (PHP_VERSION_ID >= 50600) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            \call_user_func(\Composer\Autoload\ComposerStaticInitTargetDir::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
 
-        $map = require __DIR__ . '/autoload_psr4.php';
-        foreach ($map as $namespace => $path) {
-            $loader->setPsr4($namespace, $path);
-        }
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
 
-        $classMap = require __DIR__ . '/autoload_classmap.php';
-        if ($classMap) {
-            $loader->addClassMap($classMap);
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
         }
 
         spl_autoload_register(array('ComposerAutoloaderInitTargetDir', 'autoload'), true, true);
 
         $loader->register(true);
 
-        $includeFiles = require __DIR__ . '/autoload_files.php';
+        if (PHP_VERSION_ID >= 50600) {
+            $includeFiles = Composer\Autoload\ComposerStaticInitTargetDir::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
         foreach ($includeFiles as $fileIdentifier => $file) {
             composerRequireTargetDir($fileIdentifier, $file);
         }

tests/Composer/Test/Autoload/Fixtures/autoload_static_files_by_dependency.php

@@ -0,0 +1,24 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitFilesAutoloadOrder
+{
+    public static $files = array (
+        'bfdd693009729d60c830ff8d79129635' => __DIR__ . '/..' . '/c/lorem/testC.php',
+        '61e6098c8cafe404d6cf19e59fc2b788' => __DIR__ . '/..' . '/d/d/testD.php',
+        '8bceec6fdc149a1a6acbf7ad3cfed51c' => __DIR__ . '/..' . '/z/foo/testA.php',
+        'c5466e580c6c2403f225c43b6a21a96f' => __DIR__ . '/..' . '/b/bar/testB.php',
+        '69dfc37c40a853a7cbac6c9d2367c5f4' => __DIR__ . '/..' . '/e/e/testE.php',
+        '334307692417e52db5a08c3271700a7e' => __DIR__ . '/../..' . '/root2.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+
+        }, null, ClassLoader::class);
+    }
+}

tests/Composer/Test/Autoload/Fixtures/autoload_static_functions.php

@@ -0,0 +1,23 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitFilesAutoload
+{
+    public static $files = array (
+        '6d9003eea93a81f3586b5d9c5bd91272' => __DIR__ . '/..' . '/a/a/test.php',
+        'e56cac94f86c787e1efd645809df361d' => __DIR__ . '/..' . '/b/b/test2.php',
+        'df8470dfa2ebd6b31da05b60fb4ec29a' => __DIR__ . '/..' . '/c/c/foo/bar/test3.php',
+        '68f1e24e6cd39de885cb5a47678e6518' => __DIR__ . '/..' . '/c/c/foo/bar/test4.php',
+        '61b776fd0ee84fb7d7d958ae46118ded' => __DIR__ . '/../..' . '/root.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+
+        }, null, ClassLoader::class);
+    }
+}

tests/Composer/Test/Autoload/Fixtures/autoload_static_functions_with_include_paths.php

@@ -0,0 +1,23 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitFilesAutoload
+{
+    public static $files = array (
+        '6d9003eea93a81f3586b5d9c5bd91272' => __DIR__ . '/..' . '/a/a/test.php',
+        'e56cac94f86c787e1efd645809df361d' => __DIR__ . '/..' . '/b/b/test2.php',
+        'df8470dfa2ebd6b31da05b60fb4ec29a' => __DIR__ . '/..' . '/c/c/foo/bar/test3.php',
+        '68f1e24e6cd39de885cb5a47678e6518' => __DIR__ . '/..' . '/c/c/foo/bar/test4.php',
+        '61b776fd0ee84fb7d7d958ae46118ded' => __DIR__ . '/../..' . '/root.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+
+        }, null, ClassLoader::class);
+    }
+}

tests/Composer/Test/Autoload/Fixtures/autoload_static_functions_with_removed_include_paths_and_autolad_files.php

@@ -0,0 +1,15 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitFilesAutoload
+{
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+
+        }, null, ClassLoader::class);
+    }
+}

tests/Composer/Test/Autoload/Fixtures/autoload_static_include_path.php

@@ -0,0 +1,30 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitIncludePath
+{
+    public static $prefixesPsr0 = array (
+        'M' => 
+        array (
+            'Main\\Foo' => 
+            array (
+                0 => __DIR__ . '/../..' . '/',
+            ),
+            'Main\\Bar' => 
+            array (
+                0 => __DIR__ . '/../..' . '/',
+            ),
+        ),
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixesPsr0 = ComposerStaticInitIncludePath::$prefixesPsr0;
+
+        }, null, ClassLoader::class);
+    }
+}

tests/Composer/Test/Autoload/Fixtures/autoload_static_target_dir.php

@@ -0,0 +1,41 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInitTargetDir
+{
+    public static $files = array (
+        'b419c11b924de79ffa740afc29a3dc16' => __DIR__ . '/../..' . '/foo.php',
+        'f558c96fbd0535aaa98981fa59ff7594' => __DIR__ . '/../..' . '/bar.php',
+    );
+
+    public static $prefixesPsr0 = array (
+        'M' => 
+        array (
+            'Main\\Foo' => 
+            array (
+                0 => __DIR__ . '/../..' . '/',
+            ),
+            'Main\\Bar' => 
+            array (
+                0 => __DIR__ . '/../..' . '/',
+            ),
+        ),
+    );
+
+    public static $classMap = array (
+        'ClassMapBar' => __DIR__ . '/../..' . '/lib/rootbar.php',
+        'ClassMapFoo' => __DIR__ . '/../..' . '/src/rootfoo.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixesPsr0 = ComposerStaticInitTargetDir::$prefixesPsr0;
+            $loader->classMap = ComposerStaticInitTargetDir::$classMap;
+
+        }, null, ClassLoader::class);
+    }
+}