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Question by whydoidoit · Aug 03, 2012 at 12:00 PM · profilergarbage collection

Profiler discrepancies

I'm trying to performance optimise my game to reduce garbage collection but I've run into something strange.

When not doing deep profile I see a routine allegedly allocating around 3.1-3.4kb per frame! The odd thing is that I don't really believe that the routine it claims is allocating that memory actually exists! The name displayed isn't the name of any routine in my code, it's some weird combination of names in my code. When I deep profile I can't find anything allocating a lot of memory and the non existant routine name vanishes.

Has anyone else had this? Is there some way I can confirm that I'm not really allocating 3.1kb per frame for no reason?

alt text

Normal profiling. There is no such routine as LoadAnimations.AssignExperts.

alt text

Similar point in the game with deep profile.

screen shot 2012-08-03 at 13.06.35.png (137.0 kB)
screen shot 2012-08-03 at 13.07.21.png (161.5 kB)
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Answer by whydoidoit · Aug 23, 2012 at 12:20 PM

Ok thanks to the guys on the performance team at Unite I've found that there is a bug that does not aggregate memory allocations correctly in Deep Profile mode - therefore I was allocating a lot of memory and Deep Profile was not spotting it. This bug is believed fixed in 4 - I will report back when I can get my game to run properly in 4 :) (At the moment my models are not importing correctly).

Basic bottom line: in Unity 3 do not believe memory allocation amounts shown in Deep Profile mode.

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