that said, scudo is highly configurable, and the performance reflects the configuration (you can even swap out the primary allocator, secondary cache, you can tune all the parameters, the TSD registry implementation has a big impact on multithreaded code, etc.), so it's not 100% representative - chimera's current configuration is further tweaked for both better performance and lower memory usage
scudo being this configurable is excellent because it is what enables such integration in the first place (other allocators e.g. frequently rely on ELF TLS, i.e. __thread and the likes, which would make libc integration very difficult and would require major changes to the dynamic linker, with scudo we instead implement a custom TSD registry and simply shove an extra pointer in the pthread structure)
Yet I can't find many benchmarks.
Frustratingly, it's listed here, but not actually included in the results: https://github.com/daanx/mimalloc-bench Might be fun trying to run the benchmarks myself.