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I think this is probably in the context of IT and data cache technology.

Memory works at different speeds: The registers in the processor are the fastest but there are only a few of those. Cache memory is a little slower but there is more of that, system memory is slower still but there is Gigabytes of that. Disk storage is much slower and there is more of that.

A read hit means that the information that the processor wants is in the cache so does not need to be read from main system memory. A write hit means that data is in the cache and waiting to be sent to main system memory is being changed again. Because the transfer to main memory has not yet being done the update has not increased the total work to be done.

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14y ago

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