Performance hit after attaching debugger.

I'm now using Rider IDE 2017.3.1, for developing .NET web application.

I recently noticed that just right after attaching debugger, everything has become super slow.

SO I have compared with VS Code, by debug with is. It turns out for VS Code, there's no performance drop.

Below is current enviroment. (Its part of our .csproj file.)

  <PackageReference Include="JetBrains.Annotations" Version="11.1.0" />
  <PackageReference Include="Microsoft.AspNetCore.Hosting" Version="2.0.0" />
  <PackageReference Include="Microsoft.AspNetCore.Owin" Version="2.0.0" />
  <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="2.0.0" />
  <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.0-preview1-final" />
  <PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="2.0.0" />
  <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="2.0.0" />
  <PackageReference Include="Nancy" Version="2.0.0-clinteastwood" />
  <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.1.0-preview1" />
  <PackageReference Include="StackExchange.Redis" Version="1.2.6" />
  <PackageReference Include="System.Configuration.ConfigurationManager" Version="4.5.0-preview1-25914-04" />