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The data you get by testing will provide a standard to measure customizations such as added extra RAM or drive replacements against, and will also tell you if you need an upgrade in the immediate future. Measuring your hard drive speed is one of the easiest and most effective ways to benchmark your MacBook. The former is a measure of how fast you can open something that already exists, while the latter is how fast you can add something new to your computer’s drive. Hard drive performance is measured in two categories: read speeds and write speeds.
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