benchmark

#!/bin/bash

set -e
DIR="$(dirname "$0")"

convert_n_times() {
  CONVERT_DIR="$1"
  FILENAME="$2"
  TIMES="$3"
  for i in {1..$TIMES}; do
    cd "$CONVERT_DIR" && ./convert "$FILENAME" || exit 1
  done
}

benchmark_convert() {
  CONVERT_DIR="$1"
  FILENAME="$2"
  TIMES="$3"

  time1=$(($(date +%s%N)/1000000))
  convert_n_times "$CONVERT_DIR" "$FILENAME" "$TIMES"
  time2=$(($(date +%s%N)/1000000))
  ms=$((time2 - time1))

  average=$((ms / TIMES))
  echo >&2 "${FILENAME}: ${ms}ms for ${TIMES} conversions (avg ${average}ms)"

  echo $ms
}

benchmark_strategy() {
  STRATEGY="$1"

  dir="$DIR"/"$STRATEGY"

  if [ -x "$dir"/setup ]; then
    (cd "$dir" && ./setup)
  fi

  ms_small=$(benchmark_convert "$dir" small.html 30)
  ms_medium=$(benchmark_convert "$dir" medium.html 15)
  ms_large=$(benchmark_convert "$dir" large.html 2)

  if [ -x "$dir"/teardown ]; then
    (cd "$dir" && ./teardown)
  fi

  total=$((ms_small + ms_medium + ms_large))

  echo "$STRATEGY: finished in ${total}ms"
}

if [ -z "$1" ]; then
  for strategy in $(echo using-*); do
    benchmark_strategy $strategy
  done
else
  benchmark_strategy $1
fi