Mercurial > hg
view tests/test-archive.t @ 16120:47ee41fcf42b
largefiles: optimize update speed by only updating changed largefiles
Historically, during 'hg update', every largefile in the working copy was
hashed (which is a very expensive operation on big files) and any
largefiles that did not have a hash that matched their standin were
updated.
This patch optimizes 'hg update' by keeping track of what standins have
changed between the old and new revisions, and only updating the largefiles
that have changed. This saves a lot of time by avoiding the unecessary
calculation of a list of sha1 hashes for big files.
With this patch, the time 'hg update' takes to complete is a function of
how many largefiles need to be updated and what their size is.
Performance tests on a repository with about 80 largefiles ranging from
a few MB to about 97 MB are shown below. The tests show how long it takes
to run 'hg update' with no changes actually being updated.
Mercurial 2.1 release:
$ time hg update
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
getting changed largefiles
0 largefiles updated, 0 removed
real 0m10.045s
user 0m9.367s
sys 0m0.674s
With this patch:
$ time hg update
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
real 0m0.965s
user 0m0.845s
sys 0m0.115s
The same repsoitory, without the largefiles extension enabled:
$ time hg update
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
real 0m0.799s
user 0m0.684s
sys 0m0.111s
So before the patch, 'hg update' with no changes was approximately 9.25s
slower with largefiles enabled. With this patch, it is approximately 0.165s
slower.
author | Na'Tosha Bard <natosha@unity3d.com> |
---|---|
date | Mon, 13 Feb 2012 18:37:07 +0100 |
parents | c5c9ca3719f9 |
children | 4f795f5fbb0b |
line wrap: on
line source
$ "$TESTDIR/hghave" serve || exit 80 $ hg init test $ cd test $ echo foo>foo $ hg commit -Am 1 -d '1 0' adding foo $ echo bar>bar $ hg commit -Am 2 -d '2 0' adding bar $ mkdir baz $ echo bletch>baz/bletch $ hg commit -Am 3 -d '1000000000 0' adding baz/bletch $ echo "[web]" >> .hg/hgrc $ echo "name = test-archive" >> .hg/hgrc $ cp .hg/hgrc .hg/hgrc-base > test_archtype() { > echo "allow_archive = $1" >> .hg/hgrc > hg serve -p $HGPORT -d --pid-file=hg.pid -E errors.log > cat hg.pid >> $DAEMON_PIDS > echo % $1 allowed should give 200 > "$TESTDIR/get-with-headers.py" localhost:$HGPORT "/archive/tip.$2" | head -n 1 > echo % $3 and $4 disallowed should both give 403 > "$TESTDIR/get-with-headers.py" localhost:$HGPORT "/archive/tip.$3" | head -n 1 > "$TESTDIR/get-with-headers.py" localhost:$HGPORT "/archive/tip.$4" | head -n 1 > "$TESTDIR/killdaemons.py" > cat errors.log > cp .hg/hgrc-base .hg/hgrc > } check http return codes $ test_archtype gz tar.gz tar.bz2 zip % gz allowed should give 200 200 Script output follows % tar.bz2 and zip disallowed should both give 403 403 Archive type not allowed: bz2 403 Archive type not allowed: zip $ test_archtype bz2 tar.bz2 zip tar.gz % bz2 allowed should give 200 200 Script output follows % zip and tar.gz disallowed should both give 403 403 Archive type not allowed: zip 403 Archive type not allowed: gz $ test_archtype zip zip tar.gz tar.bz2 % zip allowed should give 200 200 Script output follows % tar.gz and tar.bz2 disallowed should both give 403 403 Archive type not allowed: gz 403 Archive type not allowed: bz2 $ echo "allow_archive = gz bz2 zip" >> .hg/hgrc $ hg serve -p $HGPORT -d --pid-file=hg.pid -E errors.log $ cat hg.pid >> $DAEMON_PIDS invalid arch type should give 404 $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT "/archive/tip.invalid" | head -n 1 404 Unsupported archive type: None $ TIP=`hg id -v | cut -f1 -d' '` $ QTIP=`hg id -q` $ cat > getarchive.py <<EOF > import os, sys, urllib2 > try: > # Set stdout to binary mode for win32 platforms > import msvcrt > msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY) > except ImportError: > pass > node, archive = sys.argv[1:] > f = urllib2.urlopen('http://127.0.0.1:%s/?cmd=archive;node=%s;type=%s' > % (os.environ['HGPORT'], node, archive)) > sys.stdout.write(f.read()) > EOF $ python getarchive.py "$TIP" gz | gunzip | tar tf - 2>/dev/null test-archive-2c0277f05ed4/.hg_archival.txt test-archive-2c0277f05ed4/bar test-archive-2c0277f05ed4/baz/bletch test-archive-2c0277f05ed4/foo $ python getarchive.py "$TIP" bz2 | bunzip2 | tar tf - 2>/dev/null test-archive-2c0277f05ed4/.hg_archival.txt test-archive-2c0277f05ed4/bar test-archive-2c0277f05ed4/baz/bletch test-archive-2c0277f05ed4/foo $ python getarchive.py "$TIP" zip > archive.zip $ unzip -t archive.zip Archive: archive.zip testing: test-archive-2c0277f05ed4/.hg_archival.txt OK testing: test-archive-2c0277f05ed4/bar OK testing: test-archive-2c0277f05ed4/baz/bletch OK testing: test-archive-2c0277f05ed4/foo OK No errors detected in compressed data of archive.zip. $ "$TESTDIR/killdaemons.py" $ hg archive -t tar test.tar $ tar tf test.tar test/.hg_archival.txt test/bar test/baz/bletch test/foo $ hg archive -t tbz2 -X baz test.tar.bz2 $ bunzip2 -dc test.tar.bz2 | tar tf - 2>/dev/null test/.hg_archival.txt test/bar test/foo $ hg archive -t tgz -p %b-%h test-%h.tar.gz $ gzip -dc test-$QTIP.tar.gz | tar tf - 2>/dev/null test-2c0277f05ed4/.hg_archival.txt test-2c0277f05ed4/bar test-2c0277f05ed4/baz/bletch test-2c0277f05ed4/foo $ hg archive autodetected_test.tar $ tar tf autodetected_test.tar autodetected_test/.hg_archival.txt autodetected_test/bar autodetected_test/baz/bletch autodetected_test/foo The '-t' should override autodetection $ hg archive -t tar autodetect_override_test.zip $ tar tf autodetect_override_test.zip autodetect_override_test.zip/.hg_archival.txt autodetect_override_test.zip/bar autodetect_override_test.zip/baz/bletch autodetect_override_test.zip/foo $ for ext in tar tar.gz tgz tar.bz2 tbz2 zip; do > hg archive auto_test.$ext > if [ -d auto_test.$ext ]; then > echo "extension $ext was not autodetected." > fi > done $ cat > md5comp.py <<EOF > try: > from hashlib import md5 > except ImportError: > from md5 import md5 > import sys > f1, f2 = sys.argv[1:3] > h1 = md5(file(f1, 'rb').read()).hexdigest() > h2 = md5(file(f2, 'rb').read()).hexdigest() > print h1 == h2 or "md5 differ: " + repr((h1, h2)) > EOF archive name is stored in the archive, so create similar archives and rename them afterwards. $ hg archive -t tgz tip.tar.gz $ mv tip.tar.gz tip1.tar.gz $ sleep 1 $ hg archive -t tgz tip.tar.gz $ mv tip.tar.gz tip2.tar.gz $ python md5comp.py tip1.tar.gz tip2.tar.gz True $ hg archive -t zip -p /illegal test.zip abort: archive prefix contains illegal components [255] $ hg archive -t zip -p very/../bad test.zip $ hg archive --config ui.archivemeta=false -t zip -r 2 test.zip $ unzip -t test.zip Archive: test.zip testing: test/bar OK testing: test/baz/bletch OK testing: test/foo OK No errors detected in compressed data of test.zip. $ hg archive -t tar - | tar tf - 2>/dev/null test-2c0277f05ed4/.hg_archival.txt test-2c0277f05ed4/bar test-2c0277f05ed4/baz/bletch test-2c0277f05ed4/foo $ hg archive -r 0 -t tar rev-%r.tar $ if [ -f rev-0.tar ]; then $ fi test .hg_archival.txt $ hg archive ../test-tags $ cat ../test-tags/.hg_archival.txt repo: daa7f7c60e0a224faa4ff77ca41b2760562af264 node: 2c0277f05ed49d1c8328fb9ba92fba7a5ebcb33e branch: default latesttag: null latesttagdistance: 3 $ hg tag -r 2 mytag $ hg tag -r 2 anothertag $ hg archive -r 2 ../test-lasttag $ cat ../test-lasttag/.hg_archival.txt repo: daa7f7c60e0a224faa4ff77ca41b2760562af264 node: 2c0277f05ed49d1c8328fb9ba92fba7a5ebcb33e branch: default tag: anothertag tag: mytag $ hg archive -t bogus test.bogus abort: unknown archive type 'bogus' [255] enable progress extension: $ cp $HGRCPATH $HGRCPATH.no-progress $ cat >> $HGRCPATH <<EOF > [extensions] > progress = > [progress] > assume-tty = 1 > format = topic bar number > delay = 0 > refresh = 0 > width = 60 > EOF $ hg archive ../with-progress 2>&1 | $TESTDIR/filtercr.py archiving [ ] 0/4 archiving [ ] 0/4 archiving [=========> ] 1/4 archiving [=========> ] 1/4 archiving [====================> ] 2/4 archiving [====================> ] 2/4 archiving [===============================> ] 3/4 archiving [===============================> ] 3/4 archiving [==========================================>] 4/4 archiving [==========================================>] 4/4 \r (esc) cleanup after progress extension test: $ cp $HGRCPATH.no-progress $HGRCPATH server errors $ cat errors.log empty repo $ hg init ../empty $ cd ../empty $ hg archive ../test-empty abort: no working directory: please specify a revision [255] old file -- date clamped to 1980 $ touch -t 197501010000 old $ hg add old $ hg commit -m old $ hg archive ../old.zip $ unzip -l ../old.zip Archive: ../old.zip \s*Length.* (re) *-----* (glob) *147*80*00:00*old/.hg_archival.txt (glob) *0*80*00:00*old/old (glob) *-----* (glob) \s*147\s+2 files (re)