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Fixed in 5.3.6



Found in


Issue ID




Coroutines generate garbage in MoveNext



Coroutine::MoveNext causes the return value (a bool) to be boxed, which causes an allocation.

Reproduction Steps:
1. Run the attached project
2. Open the Profiler and sort by GC Alloc
3. Observe that FlagEndOfFrame is allocated 17B of garbage every frame

Expected Result:
It should be possible to run a coroutine without generating any garbage at all.

Comments (2)

  1. jalf

    Aug 22, 2017 04:04

    It´s really fixed?!

  2. Dino Dini

    Mar 31, 2016 21:59

    Also seen in 5.3.4f1. For any project using a lot of coroutines, this is a lot of garbage.

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