averages.sh

#!/bin/bash

benchmarkOutput() {
  local filename=$1

  cat "$filename" | grep 'ms$'
}

getUniqExpressions() {
  local filename=$1

  benchmarkOutput $filename \
    | awk '{print $8}' \
    | sed -E -e 's/-[0-9]+://g' \
    | sort \
    | uniq
}

getExpressions() {
  local filename=$1
  local uniqExpressions=$(getUniqExpressions "$filename")
  local expressions

  IFS=$'\n' read -rd '' -a expressions <<<"$uniqExpressions"
  echo "${expressions[@]}"
}

getAverage(){
  local filename=$1
  local expression=$2

  cat "$filename" \
    | grep "$expression-" \
    | awk '{print $9}' \
    | sed -e 's/ms//' \
    | average
}

usage(){
  echo "./averages.sh [filename]"
}

main(){
  local filename=$1

  if [ -z "$filename" ]; then
    usage
    exit 1
  fi

  local expressions=( $(getExpressions $filename) )

  for expression in "${expressions[@]}"; do
    local avg=$(getAverage "$filename" "$expression")
    echo "$expression: $avg"
  done
}
main $@