Apologies, the benchmark is fine. The reason the system allocator is faster than I expected is because Linux's slab allocator takes over for especially small allocation sizes, and it's terrifically fast.
I'm changing up my random-actions benchmark to display results over various allocation sizes, as some allocators do much better than others at different sizes. As a heads up, Frusa takes a large hit at higher allocation sizes. Perhaps tuning bucket sizes or something could help? I'll try to have the benchmarks on GitHub this weekend so you can play around with them, if you'd like to investigate.
I'm changing up my random-actions benchmark to display results over various allocation sizes, as some allocators do much better than others at different sizes. As a heads up, Frusa takes a large hit at higher allocation sizes. Perhaps tuning bucket sizes or something could help? I'll try to have the benchmarks on GitHub this weekend so you can play around with them, if you'd like to investigate.