No this is not the case anymore. Nowadays support for unaligned memory accesses is very good on ARM and most other CPU architectures. On x86 aligned memory used to be very important for SIMD but now there are even special SIMD instructions for unaligned data and the performance overhead of unaligned memory accesses is generally very small in my experience.
No this is not the case anymore. Nowadays support for unaligned memory accesses is very good on ARM and most other CPU architectures. On x86 aligned memory used to be very important for SIMD but now there are even special SIMD instructions for unaligned data and the performance overhead of unaligned memory accesses is generally very small in my experience.