Is Response.End() considered harmful?

Question

This KB Article says that ASP.NET\'s Response.End() aborts a thread.

Reflector shows that it looks like this:

public void End()
{
            


        

Answer 1

On classic asp, I had a TTFB (Time To First Byte) of at 3 to 10 seconds on some ajax calls, much larger than the TTFB on regular pages with many more SQL calls.

The ajax returned was a segment of HTML to be injected into the page.

The TTFB was several seconds longer than the render time.

If I added a response.end after the render, the TTFB was greatly reduced.

I could get the same effect by emitting a "", but this probably doesn't work when outputting json or xml; here response.end is needed.