Why does reportviewer 10 render reports so slowly?

I've noticed there's a HUGE difference in the rendering time between reportviewers 9 and 10 in favor of 9开发者_开发知识库. 10 seems to be at least 10 times slower. Has anyone had any experience in tweaking things to fix reportviewer 10? Using Local mode btw.

Thanks.

Isaac

I'm not sure if its because of the service pack, but now the only reports that render slowly are the ones with subreports in them.

I am having terrible problems with speed and VS2010 with firefox.

IE is instant and there is an awful lag with firefox. I noticed this question as I was writing rdlc reports at the time.