Explanation: Amazon SQS is a distributed queuing system that is optimized for horizontal scalability, not for singlethreadedsending or receiving speeds. A single client can send or receive Amazon SQS messages at arate of about 5 to 50 messages per second. Higher receive performance can be achieved byrequesting multiple messages (up to 10) in a single call. It may take several seconds before a messagethat has been to a queue is available to be received.