https://llvm.org/docs/XRay.html
https://llvm.org/docs/XRayExample.html

2022
https://lucisqr.substack.com/p/do-you-know-llvm-xray

https://research.google.com/pubs/pub45287.html

????
https://www.youtube.com/watch?v=jyL-__zOGcU
https://www.youtube.com/watch?v=cBc_MxbzqhY