Rendering View takes a very long time - asp.net-mvc

Question

We have a MVC 4 Web application. I used miniprofiler to check how long it is taking and it shows that the render of a view with three partial views is taking a very long time. I tried moving the information in the partial views directly onto the page and that didn't make a difference in the times at all. What should I do to reduce the render time? Any tips on where I should start looking? As you can see, the render is taking 48 seconds.
**| duration | from start(ms)**
|http://localhost:61380/CaseContacts | 653.7 | +0.0
|Controller: CaseController.Contacts | 11.9 | +641.1
| Contacts view - not an ajax request | 0.3 | +651.7
| populating view model | 0.0 | +652.1
| getting list of contacts | 374.4 | +652.1
| Find: Contacts | 499.8 | +1033.6
| Render: Contacts | 48400.8 | +1535.2
**| client event |duration(ms)| from start(ms)**
|Request start | | +2.0
|Response | 1.0 | +52245.0
|Dom loading | | +52247.0
|scripts | 390.0 | +52315.0
|Dom Content Loaded Event| 29.0 | +52707.0
|Dom Interactive | | + 52707.0
|Load Event | | + 52760.0
|Dom Complete | | + 52760.0
Update:
public IQueryable<T> FindQueryable(Expression<Func<T, bool>> predicate, Func<T, Object> orderBy)
{
return this.db.GetAll<T>().Where(predicate).OrderBy(orderBy).AsQueryable<T>();
}
public class ContactRepository : Repository<USRContact>, IContactRepository<USRContact>
{
public IList<ContactNameViewModel> GetAll(int fieldOfficeID, string searchText = "")
{
if (searchText.Length > 0)
return Mapper.Map<IList<USRContact>, IList<ContactNameViewModel>>(this.FindQueryable(x => (x.FieldOfficeID == fieldOfficeID) &&
(x.FormalName.Contains(searchText) || x.PreferredName.Contains(searchText) || x.Alias.Contains(searchText) || x.Pseudonym.Contains(searchText)), x => (x.STMGender.Gender)).ToList());
else
return Mapper.Map<IList<USRContact>, IList<ContactNameViewModel>>(this.FindQueryable(x => (x.FieldOfficeID == fieldOfficeID)).ToList());
}
Then my controller is loading the results onto a viewmodel and then:
#Html.Partial("~/Views/Shared/Contacts/ContactNameList.cshtml", Model.Contacts)
The partial view contains the following code:
#model IList<Casenator.Web.Models.Contact.ContactNameViewModel>
<ul id="NameList" style="margin-left:0">
#foreach (var item in Model)
{
#*<li>#Html.RouteLink(#item.FullName, "Contacts", new { id = item.ContactID })</li>*#
<li>#Ajax.RouteLink(item.FullName, "Contacts", new { id = item.ContactID }, new AjaxOptions { UpdateTargetId = "BasicInfo", OnSuccess="InitializeComboBoxes", OnBegin="LoadContact(" + item.ContactID + ")" }) </li>
}
</ul>
Any help will be appreciated!
Thanks,
Safris

Answer 1

What you are returning from query is important. If you are returning IEnumerable It would be better to reurn IQueryable. You may see this question it may help you in your situation
I don't think automapper like tools are designed to map many recoreds. you may try to map the object manually