old_contents: from corehq.apps.domain.models import Domain
  from corehq.util.couch import get_db_by_doc_type
  
  
  def get_doc_ids_in_domain_by_class(domain, doc_class):
      db = doc_class.get_db()
      doc_type = doc_class.__name__
      return get_doc_ids_in_domain_by_type(domain, doc_type, db)
  
  
  def get_doc_ids_in_domain_by_type(domain, doc_type, database=None):
      """
      Given a domain and doc type, get all docs matching that domain and type
      """
      if not database:
          database = get_db_by_doc_type(doc_type)
      return [row['id'] for row in database.view('by_domain_doc_type_date/view',
          startkey=[domain, doc_type],
          endkey=[domain, doc_type, {}],
          reduce=False,
          include_docs=False,
      )]
  
  
  def get_docs_in_domain_by_class(domain, doc_class):
      """
      Given a domain and doc class, get all docs matching that domain and type
  
      in order to prevent this from being used on a doc_class with many docs per domain
      doc_class must be white-listed.
      """
      whitelist = [
          'CallCenterIndicatorConfig',
          'CommtrackConfig',
          'Invitation',
      ]
      doc_type = doc_class.__name__
      assert doc_type in whitelist
      return doc_class.view(
          'by_domain_doc_type_date/view',
          startkey=[domain, doc_type],
          endkey=[domain, doc_type, {}],
          reduce=False,
          include_docs=True,
      ).all()
  
  
  def get_domain_ids_by_names(names):
      return [result['id'] for result in Domain.view(
          "domain/domains",
          keys=names,
          reduce=False,
          include_docs=False
      )]
  
new_contents: from corehq.apps.domain.models import Domain
  from corehq.util.couch import get_db_by_doc_type
  
  
  def get_doc_ids_in_domain_by_class(domain, doc_class):
      db = doc_class.get_db()
      doc_type = doc_class.__name__
      return get_doc_ids_in_domain_by_type(domain, doc_type, db)
  
  
  def get_doc_ids_in_domain_by_type(domain, doc_type, database=None):
      """
      Given a domain and doc type, get all docs matching that domain and type
      """
      if not database:
          database = get_db_by_doc_type(doc_type)
      return [row['id'] for row in database.view('by_domain_doc_type_date/view',
          startkey=[domain, doc_type],
          endkey=[domain, doc_type, {}],
          reduce=False,
          include_docs=False,
      )]
  
  
  def get_docs_in_domain_by_class(domain, doc_class):
      """
      Given a domain and doc class, get all docs matching that domain and type
  
      in order to prevent this from being used on a doc_class with many docs per domain
      doc_class must be white-listed.
      """
      whitelist = [
          'CallCenterIndicatorConfig',
          'CommtrackConfig',
          'Invitation',
          'PerformanceConfiguration',
      ]
      doc_type = doc_class.__name__
      assert doc_type in whitelist
      return doc_class.view(
          'by_domain_doc_type_date/view',
          startkey=[domain, doc_type],
          endkey=[domain, doc_type, {}],
          reduce=False,
          include_docs=True,
      ).all()
  
  
  def get_domain_ids_by_names(names):
      return [result['id'] for result in Domain.view(
          "domain/domains",
          keys=names,
          reduce=False,
          include_docs=False
      )]
  
subject: add PerformanceConfiguration to whitelist