#!/bin/bash

# Measure the performance of a list of revsets on a range of revisions defined

# by parameter. Checkout one by one and run perfrevset with every revset in the

# list to benchmark its performance.

#

# First argument is the starting revision to measure performance

# Second argument the ending revision to measure performance

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

#

# 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"

PERF="./hg perfrevset"

BASE_PERF="hg perfrevset"

START=$1

END=$2

readarray REVSETS < $3

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 $(seq $START $END);

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"