parallelizing rsync

I noticed a few external threads on problems with rsync performance
due to lack of parallelization.   For example modern Linux tools are
supposed to use "io_uring" for parallel i/o and some apparently have
done some experiments with this, and this is something we were looking
at as well. For example - google search shows multiple examples for
rsync with io_uring

https://news.ycombinator.com/item?id=23132549

and

https://wheybags.com/blog/wcp.html

Are there upstream patches already in progress for rsync this - or
should we submit something similar?

-- 
Thanks,

Steve

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