Editor hangs on start, spins forever on compile

Windows 7 64bit Unity 5.4.03b

Whenever I first start Unity it hangs for minutes. Task manager shows that it is slowly allocating more and more memory. Eventually it starts working again but it's really annoying. I checked the editor logs but it doesn't show anything taking a long time.

What's worse is that occasionally after I change some code and switch back to Unity it never finishes compiling. The little spinner in the bottom right just goes forever. Luckily the editor doesn't lock up but I can't run or do anything else useful so it's kind of pointless.

Is anyone else experiencing this?

[Edit] Possibly hitting ctr-b to open the built settings window and then closing it fixes the forever compiling issue?! How strange

 

I had this problem when Realtime GI was on with too high settings or when Baked GI had too big texel count. (Allocating 32GB RAM + 32GB Swap LOL). Tinker with GI settings, for example put Realtime GI to 0.01 and Baked GI Texel count to 40 from 50 etc.

 

Maybe try beta 9 as beta 3 pretty outdated now!

 

I had this problem in beta 9 myself.

 

Thanks for the responses. I can't move to beta 9 yet for reasons. I tried disabling everything to do with GI as I don't use it at all but the problem persists. It's not such a big issue for me now that I know the trick of opening the build settings in order to get it to unhang when compiling. Maybe this thread will help someone else if they run across this weird behavior.

 

Could we get a bug report with a repro project if possible? Please share the bug report number once you get the #. Thanks!