https://github.com/aras-p/llvm-project-20170507/pull/2

2019
https://aras-p.info/blog/2019/01/16/time-trace-timeline-flame-chart-profiler-for-Clang/
https://aras-p.info/blog/2019/01/12/Investigating-compile-times-and-Clang-ftime-report/