> RustFS and SeaweedFS are the fastest in the object storage field.

I'm not sure if SeaweedFS is comparable. It's based on Facebook's Haystack design, which is used to address a very specific use case: minimizing the IOs, in particular the metadata lookup, for accessing individual objects. This leads to many trade-offs. For instance, its main unit of operations is on volumes. Data is appended to a volume. Erasure coding is done per volume. Updates are done at volume level, and etc.

On the other hand, a general object store goes beyond needle-in-a-haystack type of operations. In particular, people use an object store as the backend for analytics, which requires high-throughput scans.