Summary:
Ref T7100. Ref T7108. Ref T6160. Several issues:
- High load for mercurial repositories with huge numbers of branches (T7108).
- In Mercurial, we resolve refs individually (one `hg` call per ref).
- Each repository update also updates all refs, which requires resolving all of them.
- For repositories with a huge number of branches,
- We don't distinguish between closed branches (a Mercurial-only concept) and open branches (T6160).
- In Git, when a branch is merged, it ceases to exist.
- In Mercurial, when a branch is merged, it still exists, it's just "closed". Normally, no one cares about these branches.
- In the low-level query, correctly identify which refs we resolve as branches.
- In the low-level query, correctly mark closed branches as closed.
- This marginally improves ref handling in general (see T7100).
Test Plan:
{F384366}
{F384367}
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T6160, T7108, T7100
Differential Revision: https://secure.phabricator.com/D12548
21c4aeb032