You
The bug exists now and did not three months ago. Faster way than reading diffs?
ChatGPT
git bisect run with a script that exits non-zero on failure. Twelve builds cover three months of daily commits, and the script means you can walk away while it works.
You
Anything that changes this at ten times the scale?
ChatGPT
At ten times the size the bottleneck moves from the operation itself to what it competes with: memory, locks and the people who have to run it. The approach stays, the batching gets smaller and the schedule matters more.