GC Alloc in Path.Reset()

General
#1

I’m seeing some GC being created quite frequently (40 bytes, every few frames in my game) by Path.Reset() in Path.cs.

It’s due to this line: nnConstraint = PathNNConstraint.Default;

Is it possible to improve the script to avoid that alloc?

#2

I have wanted to do that, yes. However, due to backwards compatibility it is not so trivial.

#3

Hey aron - just curious if there is any progress here?

#4

Hey @aron_granberg any ideas on how this one can be resolved? We tried a few solutions but it broke pathfinding significantly.

#5

Hi

If you never modify the NNConstraint (which includes not using seeker->traversable tags or traversable graphs) then you can create a new static field:

static readonly NNConstraint NNConstraintDefault = NNConstraint.Default;

and then change that line to

nnConstraint = NNNConstraintDefault;

If it’s just 40 bytes every few frames, I would not worry in the slightest, though. That’s a tiny amount of garbage in the greater scheme of things.