OwinContext中的批量用户创建(性能)

Question

我正在使用ASP.NET Identity和OwinContext以及EF 6将包含所有必需用户的excel文件上传到我的网站.我的代码如下所示:

foreach (var bulkUserDetail in bulkUser.BulkUserDetails)
{

        var userManager = owinContext.GetUserManager<ApplicationUserManager>();

        var userProfile = new UserProfile();

        userProfile.Username = bulkUserDetail.Username;


        AspNetUser newUser = new AspNetUser
        {
            UserName = userProfile.Username,
            Email = bulkUserDetail.Email,
            LastPasswordChangedDate = null,
        };

        var creationResult = userManager.Create(newUser);

        if (creationResult.Succeeded)
        {

            string token = userManager.GeneratePasswordResetToken(newUser.Id);

        }

}

问题是以下两行的表现非常令人失望

userManager.Create(newUser) -- (900 milliseconds)
userManager.GeneratePasswordResetToken(newUser.Id)      --(1800 milliseconds)

大量,即2000个用户,性能成为一个严重的问题.加速这个过程有更好的做法吗？我愿意接受建议,但我必须保留OwinContext库.

提前致谢

Answer 1

您可以尝试在并行中创建用户，这可能会加快总体时间，但是存在一个问题：

• Create对和 的调用GeneratePasswordResetToken很慢，因为它们调用数据库

• 并行执行工作会增加对数据库的并发调用数量，可能会进一步减慢数据库速度，这实际上取决于托管数据库的硬件有多好。

  var userManager = owinContext.GetUserManager<ApplicationUserManager>();
  
  Parallel.ForEach (bulkUser.BulkUserDetails, bulkUserDetail => 
  {       
      //Do you really need to make this userProfile as its not used
      var userProfile = new UserProfile();
  
      userProfile.Username = bulkUserDetail.Username;
  
      AspNetUser newUser = new AspNetUser
      {
          UserName = userProfile.Username,
          Email = bulkUserDetail.Email,
          LastPasswordChangedDate = null,
      };
  
      var creationResult = userManager.Create(newUser);
  
      if (creationResult.Succeeded)
      {
  
          string token = userManager.GeneratePasswordResetToken(newUser.Id);
  
      }
  })