Is the "render line" slowing to a crawl when it reaches your glass objects and then speeding up again when it passes them? If so, there's a good chance that is your problem. If not, do you have the volumetric world turned on? This makes everything crawl. You can speed up glass by turning down the refraction slider. Hope this helps.

This is not my "second childhood". I'm not finished with the first one yet.

Time flies like an arrow; fruit flies like a banana.

"I'd like to die peacefully in my sleep like my grandfather....not screaming in terror like the passengers on his bus." - Jack Handy