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我正在使用EntityFramework并且大多数情况下没有问题。 我已经对用户做了一些尝试。当延迟加载被禁用时,用户被检索并显示得非常快。EntityFramework和IdentityFramework在获取用户和角色时速度较慢
// Disable Lazy Loading
base.Configuration.LazyLoadingEnabled = false;
拉回26位用户大概需要160ms。 这很好,但我需要看到用户所属的角色和索赔。我可以继续延迟加载禁用,做这样的事情:
/// <summary>
/// Creates the User response model from the User model
/// </summary>
/// <param name="model">The User model</param>
/// <returns>A User response model</returns>
public UserViewModel Create(User model)
{
// If we are null, return nothing
if (model == null)
return null;
// Factorise our model
return new UserViewModel
{
Id = model.Id,
Department = model.Department,
Disabled = model.Disabled,
Email = model.Email,
EmailConfirmed = model.EmailConfirmed,
FirstName = model.FirstName,
HasPassword = !string.IsNullOrEmpty(model.PasswordHash),
HasTroposLogin = model.HasTroposLogin,
LastName = model.LastName,
LastLoginDate = model.LastLoginDate,
UserName = model.UserName,
UserImage = model.ProfileImageUri,
DateCreated = model.DateCreated,
DateModified = model.DateModified ?? DateTime.UtcNow,
Roles = _userProvider.GetRolesAsync(model.Id).Result,
Claims = _userProvider.GetClaimsAsync(model.Id).Result.ToList()
};
}
而且在我的代码我可能只是这样做:
/// <summary>
/// Gets a list of Users
/// </summary>
/// <returns></returns>
public async Task<IList<UserViewModel>> ListAsync(int yield)
{
// If we have a department get the users for that dept, otherwise get all users
var users = await Users.ToListAsync();
// Return our users
return users.Select(UserFactory.Create).ToList();
}
但这样做增加了装载时间约5秒(26用户!)这是不能接受的。 如果我能惰性加载并删除工厂:
/// <summary>
/// Gets a list of Users
/// </summary>
/// <returns></returns>
public async Task<IList<User>> ListAsync(int yield)
{
// If we have a department get the users for that dept, otherwise get all users
var users = await Users.ToListAsync();
// Return our users
return users.ToList();
}
它需要大约4.5秒,但只拉回到角色ID,并且不拉回来的索赔要求。
所以我的问题是这样的:
我怎么能拉回来所有的用户,角色和权利要求书,没有它采取大约5秒?当然,我不是唯一一个经历过这样的事情吗?