this post was submitted on 26 Dec 2025
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Programming
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Rust programs can definitely still consume a lot of memory. Not using a garbage collector certainly helps with memory usage, but it's not going to change it from gigabytes to kilobytes. That requires completely rethinking how things are done.
That said I'm very much in favour of everyone learning Rust, as it's a great language - but for other reasons than memory usage :)
True, but memory will be freed in a more timely manner and memory leaks probably won’t happen.
Memory leaks are more than possible in rust. Rust type system prevents things like free being called on an already free resource. It very much also allows not calling free even when nothing references things. It also makes things like arena allocation a fun endeavor compared to other systems languages. It’s not impossible just trickier. Rust isn’t a panacea, you would need something more like idris with its type system to programmatically enforce resources are freed at runtime during the compilation phase. But a fully dependent type system is very much a bleeding edge thing.