https://codspeed.io/uutils/coreutils/branches/oech3%3Anix-ctrlc?utm_source=github&utm_medium=comment-v2&utm_content=button&uri=src%2Fuu%2Fls%2Fbenches%2Fls_bench.rs%3A%3Als_recursive_balanced_tree%255B%286%252C%25204%252C%252015%29%255D&runnerMode=Simulation&q=ls_recursive_balanced_tree I'd like to have this with system allocator.