message: A `performance-inefficient-vector-operation`
  Summary: As title.
diff: @@ -1657,6 +1657,7 @@ bool MultiMethodInliner::too_many_callers(const DexMethod* callee) {
  // occur, so we are creating an ordered list of callers here to make sure we
  // always call is_inlinable in the same way.
  std::vector<DexMethod*> ordered_callers;
  + ordered_callers.reserve(callers.size());
  for (auto& p : callers) {
  ordered_callers.push_back(p.first);
  }
  