Please help me out to figure what is making my Functions Slow - asp.net-mvc

Question

Using Unit of Work Repository pattern
private UnitOfWork unitOfWork = new UnitOfWork();
private Entities _Entities = new Entities();
var filing_xml = unitOfWork.T_FILING_XMLRepository.Get().Where(a =>
a.filing_id == filingID).FirstOrDefault();
This is taking around 10 seconds to fetch data
var filing_xml = _Entities.T_FILING_XML.Where(a => a.filing_id == filingID).FirstOrDefault();
This is taking around 2 seconds to fetch data
Is there any solution to make the unit of work faster?
public virtual IEnumerable<TEntity> Get(
Expression<Func<TEntity, bool>> filter = null,
Func<IQueryable<TEntity>, IOrderedQueryable<TEntity>> orderBy = null,
string includeProperties = "")
{
IQueryable<TEntity> query = dbSet;
if (filter != null)
{
query = query.Where(filter);
}
foreach (var includeProperty in includeProperties.Split
(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
{
query = query.Include(includeProperty);
}
if (orderBy != null)
{
return orderBy(query).ToList();
}
else
{
return query.ToList();
}
}
The unit of work class
public GenericRepository<T_FILING_XML> T_FILING_XMLRepository
{
get
{
if (this.t_filing_xmlRepository == null)
{
this.t_filing_xmlRepository = new GenericRepository<T_FILING_XML>(context);
}
return t_filing_xmlRepository;
}
}

Answer 1

Code #1
private Entities _Entities = new Entities();
var filing_xml = unitOfWork.T_FILING_XMLRepository.Get().Where(a =>
a.filing_id == filingID).FirstOrDefault();
You are fetching all the records from the database then you filter the result in the application to get only one record. Your Get method has a filter parameter, why not using it?
Using the code below, you will only fetch only one record from the database.
var filing_xml = unitOfWork.T_FILING_XMLRepository.Get(a =>
a.filing_id == filingID).FirstOrDefault();