Timing your changes - FStarLang/FStar GitHub Wiki
If you make changes to the system you can test its performance with rlim and a script in FStar/.scripts/res_summary.py.
Install an rlim which has the -p switch to propagate return codes from https://github.com/arminbiere/runlim.
export your FSTAR_HOME and export RESOURCEMONITOR=1.
When you run make in FStar it will collect *.runlim files in ulib/.cache and when you run examples make it will collect them in examples/_cache.
FStar/.scripts/res_summary.py will find the .runlim files and write out a summary.
Run this single threaded for best timings.