当我尝试将PDF导出冻结时

Question

所以我正在尝试实现PDF导出。我在composer上安装了dompdf，将“'PDF'=> Barryvdh \ DomPDF \ Facade :: class”作为别名，将“ Barryvdh \ DomPDF \ ServiceProvider :: class”置于config / app.php中。在我的路线上，我有以下代码：

\Illuminate\Support\Facades\Route::get('/users/{userId}/details/{forReport}/exportPDF', function($userId) {
    $user = UserHelper::getUser($userId);
    $internal_devices = UserHelper::getUsersAssignedInternalDevices($userId);
    $external_devices = UserHelper::getUsersAssignedExternalDevices($userId);
    $licenses = UserHelper::getUsersAssignedLicenses($userId);
    $delegation_devices = UserHelper::getUsersDevicesOnDelegation($userId);
    $pdf = PDF::loadView(URLHelper::userReportView(),
        [
        'user' => $user,
        'internal_devices' => $internal_devices,
        'external_devices' => $external_devices,
        'licenses' => $licenses,
        'delegation_devices' => $delegation_devices,
    ]);
    return $pdf->download('My.pdf');
})->name('admin.exportPDF');

当我调用此路由时，执行超时，我有300秒。总之，不会生成PDF。我的代码有问题吗？

PS：我做了一个var_damp，一切看起来都很好