Understanding Memory Layout and Alignment in C Structs
Memory alignment in C structs governs how data members are positioned in memory relative to address boundaries. This behavior directly impacts memory footprint, cache efficiency, and hardware-level access correctness—especially on architectures that enforce strict alignment (e.g., ARM64 or older SPARC). Unlike high-level languages, C exposes th ...
Posted on Tue, 01 Sep 2026 16:07:09 +0000 by twigletmac
Optimizing Struct Layout for Memory Efficiency and Performance
When a struct is instantiated, its members are stored contiguously in memory according to their declaration order. However, this ordering significantly impacts both the total size of the struct and the performance of member access due to memory alignment.
Compilers align data members to specific addres boundaries to optimize CPU access. For exa ...
Posted on Wed, 29 Jul 2026 16:22:31 +0000 by bjoerndalen