On 8/18/2015 1:33 PM, Jacob Carlborg wrote:
There's profile guided optimization, which LLVM supports.
dmd does have that to some extent. If you run with -profile, the profiler will
emit a trace.def file. This is a script which can be fed to the linker which
controls the layout of functions in the executable. The layout is organized so
that strongly connected functions reside in the same page, minimizing swapping
and maximizing cache hits.
Unfortunately, nobody makes use of it, which makes me reluctant to expend
further effort on PGO.
http://www.digitalmars.com/ctg/trace.html
I wonder how many people actually use the llvm profile guided optimizations. I
suspect very, very few.
