allow LIST operation to use existing objects in the bucket

[mlddngh]

Hello,

Would it be possible to add --list-existing to the LIST operation? In order to speed up my overall benchmark run time, I tend to do PUT --> GET (with --list-existing) --> LIST --> STAT (with --list-existing) --> DELETE (with --list-existing).

I have observed that it can take a significant amount of time for warp to prepare the objects (PUT) for the list operation making the benchmark run for much longer than the requested duration, especially for large objects.

Thank you

[klauspost]

Would it be possible to add --list-existing to the LIST operation?

Yes. But we have no current plans to do so. If you send in a well-tested PR we can take a look at it.