c# - Why is nearly all the bottleneck in my Managed application External Code? -


i wrote tool reduces number of cubes in voxel world combing them larger cubes. it's entirely managed application, written in c#, , pretty ton of searching in several hashset. does, think performance reasonable, visual studio 2015 rc profiler isn't helping me assess that.

enter image description here

as can see image above, 80% of time spent in "[external code]". , doesn't seem make difference whether just code enabled or disabled each time run profiler. highly doubt it's spending 80% of time doing garbage collection, i'm wondering if might bug profiler.


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