Microsoft's Azure Storage Performance Checklist should be considered for performance tips and design guidelines.
Multiple parallel read operations are used to improve message throughput. The amount of parallel read operations is the square root of the configured message processing concurrency. This value can be increased or decreased as needed by using the
DegreeOfReceiveParallelism configuration parameter. See Azure Storage Queues Transport Configuration on how to use this parameter.
DegreeOfReceiveParallelismwill influence the total number of storage operations against Azure Storage Services and can result in higher costs.