Branchful only wins via ILP when data becomes good predictable. But since Quicksort partitioning aims for a 50/50 split, it operates in the worst possible zone

Branchful only wins via ILP when data becomes good predictable. But since Quicksort partitioning aims for a 50/50 split, it operates in the worst possible zone for a branch predictor. That's why branchless wins here, as proven by the benchmarks.