view contrib/revsetbenchmarks.sh @ 20836:a8b4541bb961

grep: reuse the first "util.binary()" result for efficiency

Before this patch, to check whether the file in the specified revision
is binary or not, "util.binary()" is invoked via internal function
"binary()" of "hg grep" once per a line of "hg grep" output, even
though binary-ness is not changed in the same file.

This patch reuses the first "util.binary()" invocation result by
annotating internal function "binary()" with "@util.cachefunc".

Performance improvement measured by "hgperf grep -r 88d8e568add1 vfs
mercurial/scmutil.py":

  before this patch:
    ! wall 0.024000 comb 0.015600 user 0.015600 sys 0.000000 (best of 118)

  after this patch:
    ! wall 0.023000 comb 0.015600 user 0.015600 sys 0.000000 (best of 123)

Status of recent(88d8e568add1) "mercurial/scmutil.py":

  # of lines:     919 (may affect cost of search)
  # of bytes:   29633 (may affect cost of "util.binary()")
  # of matches:    22 (may affect frequency of "util.binary()")

#!/usr/bin/env 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"
PERF="./hg --config extensions.perf=contrib/perf.py perfrevset"
BASE_PERF="hg --config extensions.perf=contrib/perf.py perfrevset"

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"