On Saturday, 23 December 2017 at 12:23:33 UTC, Johan Engelen
wrote:
Fine grained PGO profiling:
-fprofile-instr-generate
http://johanengelen.github.io/ldc/2016/07/15/Profile-Guided-Optimization-with-LDC.html
Function entry/exit profiling:
-finstrument-functions
https://github.com/ldc-developers/ldc/issues/1839
https://www.youtube.com/watch?v=LNav5qvyK7I
I suspect it is not too much effort to add DMD's -profile and
-profile=gc to LDC, but noone has done it yet.
Another thing that is relatively easy to add to LDC:
https://llvm.org/docs/XRay.html
Apart from profiling based on compiler instrumentation, don't
forget that LDC uses the standard object file formats/runtime
libraries for the various platforms, so all the usual profiling
tools like perf, VTune, Valgrind, etc. work just fine.
I would usually start with one of the latter for general-purpose
optimization work.
— David
