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Input/Output of data to/from a system. This usually implies file storage or network communication, but may also mean interaction with a user through a user interface.

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At what point is asynchronous reading of disk I/O more efficient than synchronous?

Unfortunately, the answer is, "it depends." It would be easy for you to write a small program to empirically determine the times of both async and sync reads. It will depend on lots of factors. Are …
Martin C. Martin's user avatar