linux - Bash, splitting files from directory into groups by size (low peformance) -

i have problem bash script split files directory groups each group size 1gb.

i have script looks this:

#!/bin/bash path=$1 unset echo $path start fpath=`pwd`"/files" find "$path" -type f>files max=`wc -l $fpath | awk '{printf $1}'` while read file;     files[i]=$file     size[i]=$(du -s $file | awk '{printf $1}')     ((i++))     echo -ne $i/$max'\r' done < `pwd`"/files" echo -ne '\n' echo 'sizes , filenames done' unset weight index groupid item in  ${!files[*]};     weight=$((weight+${size[$item]}))      group[index]=${files[$item]}     ((index++))     if [ $weight -gt "$((2**30))" ];         ((groupid++))         filename in "${group[@]}"                      echo $filename         done >euenv.part"$groupid"         unset group index weight      fi done ((groupid++)) filename in "${group[@]}"      echo $filename done >euenv.part"$groupid" echo 'done' 

it works, slow. can me , give me advice how make faster? thanks

below few suggestions, have not implemented them myself unable tell performance improvement hope give advice how make faster.

• the first loop can avoided when replace

weight=$((weight+${size[$item]}))

in second loop with:

size=$(du -s ${files[$item]} | awk '{printf $1}')

• the temporary file files can avoided when replace

for item in ${!files[*]}; do

with

find "$path" -type f | while read file

and replace ${files[$item]} ${file}.

• checking size of files can avoided when instead of

find "$path" -type f

you use

find "$path" -type f -ls

and extract columns name , size.