Mercurial > hg
view tests/test-conflict.t @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | aac921f54554 |
children | 40411ad2f5d2 |
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$ hg init $ cat << EOF > a > Small Mathematical Series. > One > Two > Three > Four > Five > Hop we are done. > EOF $ hg add a $ hg commit -m ancestor $ cat << EOF > a > Small Mathematical Series. > 1 > 2 > 3 > 4 > 5 > Hop we are done. > EOF $ hg commit -m branch1 $ hg co 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cat << EOF > a > Small Mathematical Series. > 1 > 2 > 3 > 6 > 8 > Hop we are done. > EOF $ hg commit -m branch2 created new head $ hg merge 1 merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ hg id 618808747361+c0c68e4fe667+ tip $ echo "[commands]" >> $HGRCPATH $ echo "status.verbose=true" >> $HGRCPATH $ hg status M a ? a.orig # The repository is in an unfinished *merge* state. # Unresolved merge conflicts: # # a # # To mark files as resolved: hg resolve --mark FILE # To continue: hg commit # To abort: hg merge --abort $ hg status -Tjson [ { "itemtype": "file", "path": "a", "status": "M", "unresolved": true }, { "itemtype": "file", "path": "a.orig", "status": "?" }, { "itemtype": "morestatus", "unfinished": "merge", "unfinishedmsg": "To continue: hg commit\nTo abort: hg merge --abort" } ] $ cat a Small Mathematical Series. 1 2 3 <<<<<<< working copy: 618808747361 - test: branch2 6 8 ======= 4 5 >>>>>>> merge rev: c0c68e4fe667 - test: branch1 Hop we are done. $ hg status --config commands.status.verbose=0 M a ? a.orig Verify custom conflict markers $ hg up -q --clean . $ cat <<EOF >> .hg/hgrc > [ui] > mergemarkertemplate = '{author} {rev}' > EOF $ hg merge 1 merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ cat a Small Mathematical Series. 1 2 3 <<<<<<< working copy: test 2 6 8 ======= 4 5 >>>>>>> merge rev: test 1 Hop we are done. Verify line splitting of custom conflict marker which causes multiple lines $ hg up -q --clean . $ cat >> .hg/hgrc <<EOF > [ui] > mergemarkertemplate={author} {rev}\nfoo\nbar\nbaz > EOF $ hg -q merge 1 warning: conflicts while merging a! (edit, then use 'hg resolve --mark') [1] $ cat a Small Mathematical Series. 1 2 3 <<<<<<< working copy: test 2 6 8 ======= 4 5 >>>>>>> merge rev: test 1 Hop we are done. Verify line trimming of custom conflict marker using multi-byte characters $ hg up -q --clean . $ "$PYTHON" <<EOF > fp = open('logfile', 'wb') > fp.write(b'12345678901234567890123456789012345678901234567890' + > b'1234567890') # there are 5 more columns for 80 columns > > # 2 x 4 = 8 columns, but 3 x 4 = 12 bytes > fp.write(u'\u3042\u3044\u3046\u3048'.encode('utf-8')) > > fp.close() > EOF $ hg add logfile $ hg --encoding utf-8 commit --logfile logfile $ cat >> .hg/hgrc <<EOF > [ui] > mergemarkertemplate={desc|firstline} > EOF $ hg -q --encoding utf-8 merge 1 warning: conflicts while merging a! (edit, then use 'hg resolve --mark') [1] $ cat a Small Mathematical Series. 1 2 3 <<<<<<< working copy: 1234567890123456789012345678901234567890123456789012345... 6 8 ======= 4 5 >>>>>>> merge rev: branch1 Hop we are done. Verify basic conflict markers $ hg up -q --clean 2 $ printf "\n[ui]\nmergemarkers=basic\n" >> .hg/hgrc $ hg merge 1 merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ cat a Small Mathematical Series. 1 2 3 <<<<<<< working copy 6 8 ======= 4 5 >>>>>>> merge rev Hop we are done. internal:merge3 $ hg up -q --clean . $ hg merge 1 --tool internal:merge3 merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 0 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ cat a Small Mathematical Series. <<<<<<< working copy 1 2 3 6 8 ||||||| base One Two Three Four Five ======= 1 2 3 4 5 >>>>>>> merge rev Hop we are done. Add some unconflicting changes on each head, to make sure we really are merging, unlike :local and :other $ hg up -C 2 files updated, 0 files merged, 0 files removed, 0 files unresolved updated to "e0693e20f496: 123456789012345678901234567890123456789012345678901234567890????" 1 other heads for branch "default" $ printf "\n\nEnd of file\n" >> a $ hg ci -m "Add some stuff at the end" $ hg up -r 1 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ printf "Start of file\n\n\n" > tmp $ cat a >> tmp $ mv tmp a $ hg ci -m "Add some stuff at the beginning" Now test :merge-other and :merge-local $ hg merge merging a warning: conflicts while merging a! (edit, then use 'hg resolve --mark') 1 files updated, 0 files merged, 0 files removed, 1 files unresolved use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon [1] $ hg resolve --tool :merge-other a merging a (no more unresolved files) $ cat a Start of file Small Mathematical Series. 1 2 3 6 8 Hop we are done. End of file $ hg up -C 1 files updated, 0 files merged, 1 files removed, 0 files unresolved updated to "18b51d585961: Add some stuff at the beginning" 1 other heads for branch "default" $ hg merge --tool :merge-local merging a 2 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat a Start of file Small Mathematical Series. 1 2 3 4 5 Hop we are done. End of file