ASP.NET 4.0 Custom Error Pages Very Slow to Load

When I upgraded to ASP.NET 4.0, runtime errors suddenly became very slow. There was a consistent two-minute delay before my custom error page would appear. The rest of the website was lightning fast, so it was not related to compilation. I finally decided to tackle this problem, so I started copying blocks of code into a new, blank custom error page. The delay was not present until I […]