GHC and RTS Options Cheat Sheet by nash

profiling	-prof
show runtim­e-s­ystem statistics	+RTS -T
save runtim­e-s­ystem statistics to file	+RTS -tfile
all bindings not marked INLINE	-fprof­-auto
all top-level bindings not marked INLINE	-fprof­-au­to-top
all exported bindings nto marked INLINE	-fprof­-au­to-­exp­orted
all call sites	-fprof­-au­to-­calls

compiling with	-prof -fprof­-auto -rtsopts
running with	+RTS -h
visual­izing with	hp2ps *.hp
colored OUTPUT	hp2ps -c *.hp

break by cost-c­enter	-hc
break by module	-hm
break by constr­uct­or/­closure	-hd
break by type	-hy

place rough bands on top	-d
big box for title	-b
EPS for latex	-e
for preview	-g
limit to n bands	-mn
use the previous parameters	-p
color output	-c
ignore marks	-y
print help	-?

compiling with	-prof -fprof­-auto -rtsopts
running with	+RTS -p
OUTPUT	*.prof

compiling with	-prof -fprof­-auto -rtsopts
running with	+RTC -xc

compiling with	-fhpc
running	no options need
reporting	hpc report tix file
making html files	hpc markup tix file

display help	hpc help
report coverage	hpc report
make html files	hpc markup
sum multiple coverages	hpc sum
combine two coverages	hpc combine
show in verbose mode	hpc show
display version	hpc version

optimi­zation level	-On (n =1,2,3,4)
no optimi­zation	-O0
make constr­uctor fields strict	-funbo­x-s­tri­ct-­fields
static argument transf­orm­ation	-fstat­ic-­arg­ume­nt-­tra­nsf­orm­ation
for IO/ST monad	-fno-s­tat­e-hack

allocation area size	-Asize (default: 512KB)
suggested heap size	-Hsize (default: 0KB)
maximum heap size	-Msize (default: unlimited)

Native Code Generator	-fasm
LLVM	-fllvm

use thread	-threaded
avoid repeated comput­ation of thunks	-feage­r-b­lac­kholing
avoid waiting	-fno-s­tri­ctness
use n threads	+RTS -Nn
use all processors	+RTS -N
pin threads	+RTS -qa
enable auto thread migration	+RTS -qm

make eventlog of parallel sparks (sampled)	-lp (default)
make eventlog of parallel sparks (fully accurate)	-lf