How does Go handle Memory Alignment and Size of Structs?

The physical size of a struct in Go depends heavily on the ordering of its fields due to alignment guarantees.

Different architectures require primitive types to be aligned on specific byte boundaries (e.g., an 8-byte int64 must start at an address divisible by 8). Go inserts padding bytes to satisfy these hardware rules. To optimize memory footprint, especially for structs cached by the millions, fields should be sorted from largest byte size to smallest.