[Starofall]

I have not yet compared it against this tool, but the given numbers are for download and not for syncing files.

For a S3->S3 sync using an C6gn.8xlarge instance, I got up to 800MB/sec using 64 workers, but the files were only in average around 50MB. And the bigger the file the higher the MB/sec.

Also from my short look into it, s5cmd does not support syncing between S3 providers (S3->CloudFlare).