#!/bin/bash

# Measure the performance of a list of revsets against multiple revisions

# defined by parameter. Checkout one by one and run perfrevset with every

# revset in the list to benchmark its performance.

#

# - First argument is a revset of mercurial own repo to runs against.

# - Second argument is the file from which the revset array will be taken

#   If second argument is omitted read it from standard input

#

# You should run this from the root of your mercurial repository.

#

# This script also does one run of the current version of mercurial installed

# to compare performance.

HG="hg update"

TARGETS=$1

shift

# read from a file or from standard output

if [ $# -ne 0 ]; then

    readarray REVSETS < $1

else

    readarray REVSETS

fi

hg update --quiet

echo "Starting time benchmarking"

echo

echo "Revsets to benchmark"

echo "----------------------------"

for (( j = 0; j < ${#REVSETS[@]}; j++ ));

do

  echo "${j}) ${REVSETS[$j]}"

done

echo "----------------------------"

echo

# Benchmark baseline

echo "Benchmarking baseline"

for (( j = 0; j < ${#REVSETS[@]}; j++ ));

  do

    echo -n "${j}) "

    $BASE_PERF "${REVSETS[$j]}"

done

echo

echo

# Benchmark revisions

for i in $(hg log --template='{rev}\n' --rev $TARGETS);

do

  echo "----------------------------"

  echo -n "Revision: "

  hg log -r $i --template "{desc|firstline}"

  echo "----------------------------"

  $HG $i

  for (( j = 0; j < ${#REVSETS[@]}; j++ ));

  do

    echo -n "${j}) "

    $PERF "${REVSETS[$j]}"

  done

  echo "----------------------------"

done

$HG

# Benchmark current code

echo "Benchmarking current code"

for (( j = 0; j < ${#REVSETS[@]}; j++ ));

  do

    echo -n "${j}) "

    $PERF "${REVSETS[$j]}"

done

echo

echo "Time benchmarking finished"