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view tests/test-histedit-no-change.t @ 42743:8c9a6adec67a
rust-discovery: using the children cache in add_missing
The DAG range computation often needs to get back to very old
revisions, and turns out to be disproportionately long, given
that the end goal is to remove the descendents of the given
missing revisons from the undecided set.
The fast iteration capabilities available in the Rust case make
it possible to avoid the DAG range entirely, at the cost of
precomputing the children cache, and to simply iterate on
children of the given missing revisions.
This is a case where staying on the same side of the interface
between the two languages has clear benefits.
On discoveries with initial undecided sets
small enough to bypass sampling entirely, the total cost of
computing the children cache and the subsequent iteration
becomes better than the Python + C counterpart, which relies on
reachableroots2.
For example, on a repo with more than one million revisions with
an initial undecided set of 11 elements, we get these figures:
Rust version with simple iteration
addcommons: 57.287us
first undecided computation: 184.278334ms
first children cache computation: 131.056us
addmissings iteration: 42.766us
first addinfo total: 185.24 ms
Python + C version
first addcommons: 0.29 ms
addcommons 0.21 ms
first undecided computation 191.35 ms
addmissings 45.75 ms
first addinfo total: 237.77 ms
On discoveries with large undecided sets, the initial price paid
makes the first addinfo slower than the Python + C version,
but that's more than compensated by the gain in sampling and
subsequent iterations.
Here's an extreme example with an undecided set of a million revisions:
Rust version:
first undecided computation: 293.842629ms
first children cache computation: 407.911297ms
addmissings iteration: 34.312869ms
first addinfo total: 776.02 ms
taking initial sample
query 2: sampling time: 1318.38 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings: 143.062us
Python + C version:
first undecided computation 298.13 ms
addmissings 80.13 ms
first addinfo total: 399.62 ms
taking initial sample
query 2: sampling time: 3957.23 ms
query 2; still undecided: 1005013, sample size is: 200
addmissings 52.88 ms
Differential Revision: https://phab.mercurial-scm.org/D6428
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Tue, 16 Apr 2019 01:16:39 +0200 |
parents | e7ff83b2bcfe |
children | 527ce85c2e60 |
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test for old histedit issue #6: editing a changeset without any actual change would corrupt the repository $ . "$TESTDIR/histedit-helpers.sh" $ cat >> $HGRCPATH <<EOF > [extensions] > histedit= > EOF $ initrepo () > { > dir="$1" > comment="$2" > if [ -n "${comment}" ]; then > echo % ${comment} > echo % ${comment} | sed 's:.:-:g' > fi > hg init ${dir} > cd ${dir} > for x in a b c d e f ; do > echo $x > $x > hg add $x > hg ci -m $x > done > cd .. > } $ geneditor () > { > # generate an editor script for selecting changesets to be edited > choice=$1 # changesets that should be edited (using sed line ranges) > cat <<EOF | sed 's:^....::' > # editing the rules, replacing 'pick' with 'edit' for the chosen lines > sed '${choice}s:^pick:edit:' "\$1" > "\${1}.tmp" > mv "\${1}.tmp" "\$1" > # displaying the resulting rules, minus comments and empty lines > sed '/^#/d;/^$/d;s:^:| :' "\$1" >&2 > EOF > } $ startediting () > { > # begin an editing session > choice="$1" # changesets that should be edited > number="$2" # number of changesets considered (from tip) > comment="$3" > geneditor "${choice}" > edit.sh > echo % start editing the history ${comment} > HGEDITOR="sh ./edit.sh" hg histedit -- -${number} 2>&1 | fixbundle > } $ continueediting () > { > # continue an edit already in progress > editor="$1" # message editor when finalizing editing > comment="$2" > echo % finalize changeset editing ${comment} > HGEDITOR=${editor} hg histedit --continue 2>&1 | fixbundle > } $ graphlog () > { > comment="${1:-log}" > echo % "${comment}" > hg log -G --template '{rev} {node} \"{desc|firstline}\"\n' > } $ initrepo r1 "test editing with no change" % test editing with no change ----------------------------- $ cd r1 $ graphlog "log before editing" % log before editing @ 5 652413bf663ef2a641cab26574e46d5f5a64a55a "f" | o 4 e860deea161a2f77de56603b340ebbb4536308ae "e" | o 3 055a42cdd88768532f9cf79daa407fc8d138de9b "d" | o 2 177f92b773850b59254aa5e923436f921b55483b "c" | o 1 d2ae7f538514cd87c17547b0de4cea71fe1af9fb "b" | o 0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b "a" $ startediting 2 3 "(not changing anything)" # edit the 2nd of 3 changesets % start editing the history (not changing anything) | pick 055a42cdd887 3 d | edit e860deea161a 4 e | pick 652413bf663e 5 f 0 files updated, 0 files merged, 2 files removed, 0 files unresolved Editing (e860deea161a), you may commit or record as needed now. (hg histedit --continue to resume) $ continueediting true "(leaving commit message unaltered)" % finalize changeset editing (leaving commit message unaltered) check state of working copy $ hg id 794fe033d0a0 tip $ graphlog "log after history editing" % log after history editing @ 5 794fe033d0a030f8df77c5de945fca35c9181c30 "f" | o 4 04d2fab980779f332dec458cc944f28de8b43435 "e" | o 3 055a42cdd88768532f9cf79daa407fc8d138de9b "d" | o 2 177f92b773850b59254aa5e923436f921b55483b "c" | o 1 d2ae7f538514cd87c17547b0de4cea71fe1af9fb "b" | o 0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b "a" $ cd .. $ initrepo r2 "test editing with no change, then abort" % test editing with no change, then abort ----------------------------------------- $ cd r2 $ graphlog "log before editing" % log before editing @ 5 652413bf663ef2a641cab26574e46d5f5a64a55a "f" | o 4 e860deea161a2f77de56603b340ebbb4536308ae "e" | o 3 055a42cdd88768532f9cf79daa407fc8d138de9b "d" | o 2 177f92b773850b59254aa5e923436f921b55483b "c" | o 1 d2ae7f538514cd87c17547b0de4cea71fe1af9fb "b" | o 0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b "a" $ startediting 1,2 3 "(not changing anything)" # edit the 1st two of 3 changesets % start editing the history (not changing anything) | edit 055a42cdd887 3 d | edit e860deea161a 4 e | pick 652413bf663e 5 f 0 files updated, 0 files merged, 3 files removed, 0 files unresolved Editing (055a42cdd887), you may commit or record as needed now. (hg histedit --continue to resume) $ continueediting true "(leaving commit message unaltered)" % finalize changeset editing (leaving commit message unaltered) Editing (e860deea161a), you may commit or record as needed now. (hg histedit --continue to resume) $ graphlog "log after first edit" % log after first edit @ 6 e5ae3ca2f1ffdbd89ec41ebc273a231f7c3022f2 "d" | | o 5 652413bf663ef2a641cab26574e46d5f5a64a55a "f" | | | o 4 e860deea161a2f77de56603b340ebbb4536308ae "e" | | | o 3 055a42cdd88768532f9cf79daa407fc8d138de9b "d" |/ o 2 177f92b773850b59254aa5e923436f921b55483b "c" | o 1 d2ae7f538514cd87c17547b0de4cea71fe1af9fb "b" | o 0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b "a" abort editing session, after first forcibly updating away $ hg up 0 abort: histedit in progress (use 'hg histedit --continue' or 'hg histedit --abort') [255] $ mv .hg/histedit-state .hg/histedit-state-ignore $ hg up 0 0 files updated, 0 files merged, 3 files removed, 0 files unresolved $ mv .hg/histedit-state-ignore .hg/histedit-state $ hg sum parent: 0:cb9a9f314b8b a branch: default commit: 1 added, 1 unknown (new branch head) update: 6 new changesets (update) phases: 7 draft hist: 2 remaining (histedit --continue) $ hg histedit --abort 2>&1 | fixbundle modified files should survive the abort when we've moved away already $ hg st A e ? edit.sh $ graphlog "log after abort" % log after abort o 5 652413bf663ef2a641cab26574e46d5f5a64a55a "f" | o 4 e860deea161a2f77de56603b340ebbb4536308ae "e" | o 3 055a42cdd88768532f9cf79daa407fc8d138de9b "d" | o 2 177f92b773850b59254aa5e923436f921b55483b "c" | o 1 d2ae7f538514cd87c17547b0de4cea71fe1af9fb "b" | @ 0 cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b "a" aborting and not changing files can skip mentioning updating (no) files $ hg up 5 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg commit --close-branch -m 'closebranch' $ startediting 1 1 "(not changing anything)" # edit the 3rd of 3 changesets % start editing the history (not changing anything) | edit 292aec348d9e 6 closebranch Editing (292aec348d9e), you may commit or record as needed now. (hg histedit --continue to resume) $ hg histedit --abort $ cd ..