[jeffbee]

ifunc memcpy also makes short copies suck ass on those platforms, since the dispatch cost dominates regardless of the vectorization. It's an open question whether ifunc helps or harms the performance of general use cases.

By "open question" I meant that there is compelling research indicating that GNU memcpy/memcmp is counterproductive, but the general Linux-using public did not get the memo.

https://storage.googleapis.com/gweb-research2023-media/pubto...

"AsmDB: Understanding and Mitigating Front-End Stalls in Warehouse-Scale Computers" Section 4.4 "Memcmp and the perils of micro-optimization"