#!/bin/bash

declare -r math='11 ** 12 / 3 % 470'
declare -a sortedRes=()
declare -i numTests=${1:-0} st=${EPOCHREALTIME/.}
((numTests)) || for ((;${EPOCHREALTIME/.}-st<400000;numTests+=6)) { :;}

for tst in {unset,declare\ -i}\ Val:{'Val=$(( '"$math"' ))',"Val='$math'"} ;do
#   declare -p tst
    eval ${tst%%:*}
    start=${EPOCHREALTIME/.}
    eval "for i in {1..$numTests} ;do ${tst##*:};done"
    elap=00$((${EPOCHREALTIME/.}-start))
    typevar=String
    [ "${tst%% *}" = "declare" ] && typevar=Integer
    typeOp=${tst##*=}
    printf -v sortedRes[10#$elap] '%-24s: %8.3fms  -> \47%s\47' \
       ${typevar}' var = '"${typeOp//11*470/...}" ${elap::-3}.${elap: -3} "$Val"
done

printf "%s\n" "${sortedRes[@]}"

elap=00000$((${EPOCHREALTIME/.}-st))
printf "( Total execution time: %.5f seconds for 4 x %'d assignments. )\n" \
       ${elap::-6}.${elap: -6} $numTests