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Memory FastCopy

LibXR::Memory::FastCopy is an optimized memory copy path with alignment and burst-copy improvements, designed to replace the generic memcpy in hot-path scenarios (such as ring buffer transfers or IO send/receive buffer packaging). It automatically chooses the optimal copy granularity of 8/4/2/1 bytes based on the alignment of source/destination pointers, and applies loop unrolling to improve throughput.

This implementation only supports non-overlapping copy semantics;

API​

namespace LibXR {
class Memory {
 public:
  /**
   * @brief Fast memory copy
   * @param dst  Destination address
   * @param src  Source address
   * @param size Number of bytes to copy
   */
  static void FastCopy(void* dst, const void* src, size_t size);
};
} // namespace LibXR

Usage Example​

#include "libxr_def.hpp"

uint8_t src[256];
uint8_t dst[256];

// ... fill src ...

// Non-overlapping fast copy
LibXR::Memory::FastCopy(dst, src, sizeof(src));