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Following query i write it returns me 1400 records. and below line taking much time.
1.5 second taken by
count = quer != null ? quer.Count() : 0;
and 2 sec taken by
candidateList = quer.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
Please suggest.
The LINQ tools are very handy for developers, but they were never guaranteed to perform better than ugly CAML code or be more resilient to user changes (hint: they rely on display names that may change), for that matter.
Look into ULS logs (Set-SPLogLevel -Trace Verbose) for answers in the Database category.
Moreover, I assume you're doing this from a Console executable on a development machine, right?
Try SQL Server Management Studio's profiler or other tools to understand what's the load on SQL Database, how are the indexes/indices and execution plans (mis)used. Sometimes you might find useful to check for database fragmentation.
