Choosing Standard or Express Workflows
Amazon Step Functions offers Standard Workflows as the default workflow type, with the option to choose Express Workflows.
You can choose Standard Workflows when you need long-running, durable, and auditable
workflows, or Express Workflows for high-volume, event processing workloads. Your state
machine executions will behave differently, depending on which Type you select.
The Type you choose cannot be changed after your state machine has been
created.
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For detailed information about the differences between Standard and Express Workflows, see Standard vs. Express Workflows.
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For information about optimizing cost while building serverless workflows using Step Functions, see Cost-optimization using Express Workflows.