It was over a year ago so it's a bit hard to recall... Maybe 20 minutes clean? 1 or 2 minutes for cached. Things have probably improved since then but idk. We did stuff like protobuf, we had a few proc-macros of our own, plenty of serde, and I think ~3 native dependencies (zstd, librdkafka, something else I don't recall). The native dependencies could be brutal, it caused long serial stalls, if I recall correctly. Linking took up a lot of time as well, but I forget why we didn't use mold, there was a reason at the time... but, again, over a year ago.

Here's the code: https://github.com/grapl-security/grapl/tree/main/src/rust