bUseAdaptiveUnityBuild (Boolean)

Use a heuristic to determine which files are currently being iterated on and exclude them from unity blobs, result in faster incremental compile times. The current implementation uses the read-only flag to distinguish the working set, assuming that files will be made writable by the source control system if they are being modified. This is true for Perforce, but not for Git.

4.19 올리고 나서 작업하는 파일만 Unity Build 에서 빼서 컴파일이 되길래 엔진 기능인 줄 알았는데 마침 그 때 Perforce 로 저장소를 바꿔서 동작하는거였다. -ㅁ-