asp.net - Is there an overhead with tracking when using EF6.1 and if so how can I remove this? -

i have complex queries this:

  var contents = await db.contents             .where(q => q.contentstatusid == contentstatusid || contentstatusid == 0)             .where(q => q.contenttypeid == contenttypeid || contenttypeid == 0)             .where(q => q.createdby == contentcreatedby || contentcreatedby == "0")             .where(q => q.modifiedby == contentmodifiedby || contentmodifiedby == "0")             .where(q => q.subjectid == subjectid)             .tolistasync(); 

i send results web api , not need tracking. ef automatically add tracking , if overhead not need. if there way can turn off tracking ?

yes there overhead. can use asnotracking() on iqueryable or dbset.

var contents = await db.contents         .where(q => q.contentstatusid == contentstatusid || contentstatusid == 0)         .where(q => q.contenttypeid == contenttypeid || contenttypeid == 0)         .where(q => q.createdby == contentcreatedby || contentcreatedby == "0")         .where(q => q.modifiedby == contentmodifiedby || contentmodifiedby == "0")         .where(q => q.subjectid == subjectid)         .asnotracking()         .tolistasync();