# Foundationdb-rs versions

**URL:** <https://forums.foundationdb.org/t/foundationdb-rs-versions/5456>\
**Category:** Using FoundationDB\
**Created:** [September 4, 2026, 12:52pm UTC](https://forums.foundationdb.org/t/foundationdb-rs-versions/5456 "2026-09-04T12:52:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cisaacson](https://sea1.discourse-cdn.com/foundationdb/user_avatar/forums.foundationdb.org/cisaacson/32/2087_2.png) [@cisaacson](https://forums.foundationdb.org/u/cisaacson)\
**Post date:** [September 4, 2026, 12:52pm UTC](https://forums.foundationdb.org/t/foundationdb-rs-versions/5456/1 "2026-09-04T12:52:49Z")

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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 `future`s 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.