It existed to make a bisect bearable — rendering all 48 routes to measure one of them was most of the
wait. The bisect is over and the switch is not something to leave lying in a build script, because it
also disables the prune at the swap, and a build that quietly does not clean up after itself is worse
than a slow one.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>