BENGALURU, June 18 : Artificial intelligence is accelerating productivity at Deutsche Bank, enabling tasks that once took years to be completed within months, a senior executive said on Thursday. The German lender is using AI to speed up technology projects and tackle a backlog of internal work, but it is keeping a wary eye on rising computing costs. "We're seeing things that were two years that are now getting done in three to six months… we know the productivity is there," said Denis Roux,