New answers tagged updatelistitems
Unfortunately, there is no other way like SystemUpdate(false); or SPListItem.UpdateOverwriteVersion() on ProcessBatchData according to sharepoint SDK. As a workaround, you could try to turn off the version control temporarily. Source
SPWeb.ProcessBatchData processes batch updates significantly faster than individual updates. Use batch processing when updating a larger number of items. It will allow the database to process all your update requests at once and will significantly improve the overall performance of your SharePoint application.
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