migration is ok again (remains probleme of ram consuming > 4Go for users

web/modules/dev/migrate_booster/src/HooksEnablerSubscriber.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\migrate_booster;
+
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+* Provides a MyModuleSubscriber.
+*/
+class HooksEnablerSubscriber implements EventSubscriberInterface {
+
+  /**
+  * {@inheritdoc}
+  */
+  static function getSubscribedEvents() {
+    $events[KernelEvents::REQUEST][] = array('ensureHooksEnabled', 20);
+    return $events;
+  }
+
+  /**
+   * Triggers on 'kernel.request' event which occurs when Drupal
+   * bootstraps (but not when Drush or Drupal console command runs).
+   */
+  public function ensureHooksEnabled() {
+    MigrateBooster::bootDrupal();
+  }
+
+}