KodrAus

Profiling performance

Using perf:

$ perf record -g binary
$ perf script | stackcollapse-perf.pl | rust-unmangle | flamegraph.pl > flame.svg

NOTE: See @GabrielMajeri's comments below about the -g option.

xfire

{-# LANGUAGE GeneralizedNewtypeDeriving #-}

import Control.Monad.Reader
import Control.Monad.State
import Control.Monad.Writer

-- our monad transformer stack
--   a reader with an prefix string for the log
--      a state with the current value as integer
--         a writer to log the work done