feat(users/edef/weave): use FxHashSet and dedupe early r/8846

Deduping early saves a fair bit of memory, but the extra hashing is
costly.

We switch to FxHash, since we don't need a DoS-proof hash, but we do
need it to be *fast*.

Change-Id: Ic6b7010874c417862baa9b882593208c8dd1d5e6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12648
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

0 files changed, 0 insertions, 0 deletions