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Rust Memory Layouts: repr(Rust) vs repr(C) and Packed Structs
This article explores Rust's memory type representations, focusing on repr(Rust) which allows compiler reordering to reduce padding. It shows a struct with u64, u32, u16, u8, and bool fields can be packed into 16 bytes versus 32 with repr(C). Packed layouts and alignment annotations are also covered, with warnings about performance and crash risks.
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A deep dive into Rust's memory optimization that matters for systems programmers, but the niche topic limits broader appeal.
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[Advanced Rust] 1.14. Memory Types Pt.2 - Dynamically Sized Types and Wide Pointers, Packed Layouts, Larger Alignment for Speci… →
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