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Researchers say they can spy on your browsing by measuring SSD activity through a browser API
(www.tomshardware.com)
this post was submitted on 28 May 2026
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The OS can cache parts of files in RAM to speed up accesses. That cache is called the page cache. If your file is big enough you can fairly reliably access random parts of it and expect the OS to not have cached them no matter how big the page cache is. So each read hits the SSD, allowing you to observe its performance.
Neat. Thank you for the explanation.