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After several public betas, we launched Amazon Simple Queue Service (Amazon SQS) in 2006. Nearly two decades later, this fully managed service is still a fundamental building block for microservices, distributed systems, and serverless applications, processing over 100 million messages per second at peak times.
Because there’s always a better way, we continue to look for ways to improve performance, security, internal efficiency, and so forth. When we do find a potential way to do something better, we are careful to preserve existing behavior, and often run new and old systems in parallel to allow us to compare results.