>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #2881995. --> Reported by: [larowlan](https://www.drupal.org/user/395439) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>Nested set writes are heavy<br> During migration they can be very slow</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>Add a state flag to disable them during migration<br> People can then use drush command for a full rebuild after migration</p> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <p>Patch</p> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>