Which of the following is the fastest option to store states in MuleSoft?

The fastest option to store states in MuleSoft is non-persistent storage. This method allows for quick access and retrieval since it does not involve the overhead associated with persisting data to a durable storage medium. Non-persistent storage temporarily holds data in memory, making it ideal for scenarios where speed is paramount and the data does not need to be retained after the application stops running or for future transactions.

In contexts where performance is critical, using non-persistent storage can lead to significant improvements in response times, as the system can quickly access and manipulate the data without waiting for I/O operations associated with persistent storage systems. This makes non-persistent storage especially useful for transient state data that needs to be accessed frequently but does not require durability across different sessions or restarts of the application.

While persistent storage, state replication to a distributed memory data grid, and backing a Mule runtime cluster with a persistent database do provide durability and consistency, they introduce latency because of the additional processing needed to write or replicate data reliably, which makes them less suitable for applications where speed is the primary concern.