The most important advantage of Diskeeper is that disk accessing by other programs doesn't bother it.
2.
Davies stated that scrolling times were " painfully slow " due to the excessive disk accessing.
3.
These interrupts are also more time consuming because disk accessing is in the order of milliseconds ( as opposed to nanoseconds for memory ) . I'm guessing that because disk operations / memory operation interrupts have priority over peripheral interrupts, that the OS polls your mouse less when disk intensive operations are being performed.
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