We were using the rust 0.8.0 crate and things were performing well in release mode. We upgraded to 0.10.0 and saw as much as a 10x slowdown when retrieving many keys in a futures batch or a range. We are running foundationdb 7.1 on the back end and used that feature with both versions of the crate. We reverted, but I would like to know if there is some other incompatibility we might have, the 0.10.0 should be faster, but perhaps it is not as good with FDB 7.1? Any advice appreciated.