Light bake times on 5.4 vs 5.3

I'm just wondering if others have noticed a difference in light baking times on 5.4?

For us, light baking takes roughly double the time. The results are better, we can see the improvements that have been made. However, where our overnight light bake CI job used to just fit into a night for all our scenes, it now won't which is a pain and so we are having to look at splitting this over multiple machines.

Our scenes are quite complex. These are our timings for each:

Before After
00:49:00 01:49:00
01:07:00 03:03:00
01:04:00 02:03:00
00:19:00 00:23:00
00:27:00 00:34:00
00:51:00 01:23:00
01:06:00 02:41:00
00:46:00 01:17:00
01:20:00 02:01:00
00:06:00 00:05:00
00:26:00 00:39:00
00:19:00 00:33:00
00:53:00 00:52:00
00:38:00 01:53:00
00:25:00 00:55:00
00:24:00 00:55:00

A bit more investigation today seems to suggest that it is using more RAM. We get to the point where we have 2 spawned processes at 7.5GB each on a machine with 16GB total. I suspect that they are being constrained by this and potentially hitting the swap file, which would explain slowdown.

Upgrading to 32GB did give a marginal improvement, but it still way slower than it was.

Thanks,

Kieran

 

Could we get a bug report #?

 

Case 789908

 

Is this 5.4b15, or some other version? I can't get baked lighting to work at all in the latest build...

http://forum.unity3d.com/threads/baked-lighting-broken-in-v5-4b15.398630/

 

6.4b12 is the version that we have done the timings for. I have done minimal testing on b13 and b15 and it appears to be roughly the same on those. Baked lighting was working on b15 though when I briefly tried it.

 

We have noticed that Bake Indirect and Final Gather seem to take the most time if that helps.