Fix bench (to use Id rather than Bytes)

[mikedilger]

Description

$ make bench is broken because dommit 6e686b30ac6ad4789e65bd4b24dd38b7d1dffd1b failed to get everything.

(perhaps make precommit should do a make bench?)

All Submissions:

• [X] I've signed all my commits
• [X] I followed the contribution guidelines
• [x] I ran make precommit before committing