Merge copies of converting an XID to a FullTransactionId.
Assume twophase.c is the performance-sensitive caller, and preserve its
choice of unlikely() branch hint. Add some retrospective rationale for
that choice. Back-patch to v17, for the next commit to use it.
Reviewed (in earlier versions)
Merge copies of converting an XID to a FullTransactionId.
Assume twophase.c is the performance-sensitive caller, and preserve its
choice of unlikely() branch hint. Add some retrospective rationale for
that choice. Back-patch to v17, for the next commit to use it.
Reviewed (in earlier versions)
