Mmastodon TechnologySoftware first seen 9 h ago, last 9 h ago, peak #11
Explainer: How Copy-on-Write Saves Memory Without Copying
Original: What Is Copy-on-Write? How Can a Process "Copy" Memory Without Actually Copying It? ... # computerscience # performance
A new technical explainer is making the rounds on how copy-on-write works in operating systems. The article walks through how a process can 'copy' memory lazily: both processes share the same physical pages until one writes to them, at which point the kernel duplicates only that page. The piece covers why this technique is central to fork, virtual memory efficiency, and overall system performance.
Why now: It is an accessible explainer on a core computer science concept that programmers frequently encounter but rarely see explained clearly.
copy-on-writeoperating systemsvirtual memory
Evidence
- What Is Copy-on-Write? How Can a Process "Copy" Memory Without Actually Copying It? ... # computerscience # performance # programming # software # coding # development # engineering # inclusive # community great read · hackaday@www.urbanmind.net · 3
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