memcpy
| Library | Technique |
|---|---|
| Linux | rep movs |
| Glibc | movq pipelined by hand (32 bits) |
rep movs for 32 < n < ½L1 |
|
movq with prefetching for ½L1 < n < L1 |
|
movntiq with prefetching for L1 < n |
|
| Musl | rep movs |
Comparing different memcpy implementations.