How can I decrease my scale out times when using Virtual Machine Scale Sets?
Standby pools for Virtual Machine Scale Sets with flexible orchestration enables you to increase scaling performance by creating a pool of pre-provisioned virtual machines from which the scale set can draw from when scaling out.
Standby pools reduce the time to scale out by performing various initialization steps such as installing applications/ software or loading large amounts of data. These initialization steps are performed on the virtual machines in the standby pool before to being put into the scale set.
Learn more about Standby pools for Virtual Machine Scale Sets