e1e5ed5893
Tighten the reserve() to `Record.size() / 2` instead of `Record.size()` in the HasProfile/HasRelBF cases. For the uncommon old profile format cases we leave it as is, but those should be rare and not worth optimizing. This reduces peak memory during ThinLTO indexing by ~3% in one example. Alternatively, we could make the branching for reserve more complex and try to cover every case.