Does it make sense that the speed of synchronous `multi_get` exceeds asynchronous `get`?

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Yes, it is possible for the speed of synchronous multi_get to exceed asynchronous get because synchronous operations block the execution until they have completed, whereas asynchronous operations allow the program to continue executing while the operation is being performed. This means that synchronous multi_get can fetch multiple keys simultaneously in a single network call, whereas asynchronous get would make multiple individual network calls. Therefore, for a smaller number of keys, asynchronous get may be faster due to less overhead, but for a larger number of keys, synchronous multi_get may be faster because of reduced network round-trip time.