--- title: "Immutability Wastes RAM? Not Quite!" url: https://daily.dev/posts/immutability-wastes-ram-not-quite--yqb0nzoxh source_url: https://www.youtube.com/watch?v=gDohTCVd8RY type: video:youtube source: "Zoran Horvat" published: 2026-03-10T07:36:26.685Z updated: 2026-03-10T07:36:45.383Z tags: ["c#"] reading_time: 10 upvotes: 16 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Immutability Wastes RAM? Not Quite! **[Zoran Horvat](https://daily.dev/sources/zoranhorvat)** · 10 min read · 16 upvotes · 0 comments ## Summary A common belief is that immutable designs waste more memory than mutable ones because every operation creates a new object. This is a misconception. The key insight is 'persistent objects': in well-designed immutable systems, operations reuse large portions of the existing object graph, only creating new objects at the top level while sharing unchanged sub-objects. Mutable designs cannot safely share object references because one owner mutating a shared object would corrupt the state of another. This means immutable designs can actually allocate fewer total objects than equivalent mutable designs, while also reducing bugs. The C# compiler is cited as a real-world example of a fast, low-memory, fully immutable system. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Stop Using Shared Mutable State — Embrace Immutability for Safer Code](https://daily.dev/posts/stop-using-shared-mutable-state-embrace-immutability-for-safer-code-r2wrr0tjn) · Javarevisited · 1 upvotes · 0 comments --- Tags: [#c#](https://daily.dev/tags/c#) [View this post on daily.dev](https://daily.dev/posts/immutability-wastes-ram-not-quite--yqb0nzoxh)