Linqコンパイルされたクエリとパフォーマンスの問題

Question

linqコンパイルされたクエリのパフォーマンスの問題があります。

using (var txn = new TransactionScope(TransactionScopeOption.Required, new TransactionOptions { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted })) 
     { 
      DateTime dealcheck = new DateTime(1753, 2, 2); 

      Func<DealDataClassesDataContext, string, IQueryable<DealsDetails>> DD = 
      CompiledQuery.Compile<DealDataClassesDataContext, string, IQueryable<DealsDetails>> 

    ((DealDataClassesDataContext nw, string sCity) => 

     from D in nw.Deals 

     where D.Address == City && (D.DealTime >= DateTime.Now || D.DealTime == dealcheck) && PriceMax >= D.DealPrice && D.DealPrice >= PriceMin && DisCountMax >= D.SavingsRate && D.SavingsRate >= DiscountMin && (D.DealTime >= DateTime.Now.AddDays(TimeMin) && D.DealTime <= DateTime.Now.AddDays(TimeMax) || D.DealTime == dealcheck) 

     select new DealsDetails(
          lst, 
          D.DealId, 
          D.DealHeadline, 
          D.DealCategory, 
          D.BuyPrice, 
          D.DealPrice, 
          D.SavingsRate, 
          D.SavingAmount, 
          D.RelatedWebsite, 
          D.Address, 
          string.Empty, 
          D.DealImage, 
          string.Empty, 
          string.Empty, 
          D.Time, D.CurrentTime, D.DealTime, 
         D.Location, string.Empty, string.Empty, D.Latitude, D.Longitude, D.Islocal, D.VendorMail, D.MerchantInfo, D.Review, D.HowItWork, D.DealUrl 
         )); 

      string jString = ""; 

      //int a = q(DealDbContext1, "London").Count(); 

      using (DealDataClassesDataContext db = new DealDataClassesDataContext()) 
      { 
       IQueryable<DealsDetails> DDD = DD.Invoke(DealDbContext, "London"); 

       if (lstSite.Count > 0 && lstSite[0] != "AllDeals") 
       { 
        DDD = DDD.Where(D => D.RelatedWebsite.Split(',').Where(x => lstSite.Contains(x)).Any()); //.Where(row => row.Category.ToList().Where(x => lst.Contains(x)).Any()).ToList(); 
       } 
       if (lst.Count > 0) 
       { 
        DDD = DDD.Where(D => D.Categories.Split(',').Where(x => lst.Contains(x)).Any()); //.Where(row => row.Category.ToList().Where(x => lst.Contains(x)).Any()).ToList(); 
       } 
       if (sortby == "Time" && orderby == "Asc") 
       { 
        DDD = (from d in DDD orderby d.Time ascending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else if (sortby == "Time" && orderby == "Desc") 
       { 
        DDD = (from d in DDD orderby d.Time descending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else if (sortby == "Price" && orderby == "Asc") 
       { 
        DDD = (from d in DDD orderby d.DealPrice ascending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else if (sortby == "Price" && orderby == "Desc") 
       { 
        DDD = (from d in DDD orderby d.DealPrice descending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else if (sortby == "Percent" && orderby == "Asc") 
       { 
        DDD = (from d in DDD orderby d.SavingsRate ascending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else if (sortby == "Percent" && orderby == "Desc") 
       { 
        DDD = (from d in DDD orderby d.SavingsRate descending select d).Skip((Page - 1) * PageSize).Take(PageSize); 
       } 
       else 
       { 
        DDD = DDD.Skip((Page - 1) * PageSize).Take(PageSize); 
       } 

       string Currency = "$"; 
       foreach (DealsDetails item in DDD) 
       { 
        //Creating Html String Here 
       } 

       return jString; 

私はこのそれはarroundの20秒を対応するため、あまりにも長い時間を取っていると問題が何であるかを確認してくださいここに私のコード全体を添付しています。

主にforeachループが17秒以上続いています。

このクエリをコンパイルする方法を教えてください。

ありがとうございました。

Answer 1

プリコンパイルあなたのクエリに加えて、あなたはpre-generate the local query views