Mercurial > hg
view tests/test-histedit-fold-non-commute.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 | 15d2afa31e57 |
children |
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$ . "$TESTDIR/histedit-helpers.sh" $ cat >> $HGRCPATH <<EOF > [extensions] > histedit= > EOF $ modwithdate () > { > echo $1 > $1 > hg ci -m $1 -d "$2 0" > } $ initrepo () > { > hg init $1 > cd $1 > for x in a b c d e f ; do > echo $x$x$x$x$x > $x > hg add $x > done > hg ci -m 'Initial commit' > modwithdate a 1 > modwithdate b 2 > modwithdate c 3 > modwithdate d 4 > modwithdate e 5 > modwithdate f 6 > echo 'I can haz no commute' > e > hg ci -m 'does not commute with e' -d '7 0' > cd .. > } $ initrepo r $ cd r Initial generation of the command files $ EDITED="$TESTTMP/editedhistory" $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 3 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 4 >> $EDITED $ hg log --template 'fold {node|short} {rev} {desc}\n' -r 7 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 5 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 6 >> $EDITED $ cat $EDITED pick 092e4ce14829 3 c pick ae78f4c9d74f 4 d fold 42abbb61bede 7 does not commute with e pick 7f3755409b00 5 e pick dd184f2faeb0 6 f log before edit $ hg log --graph @ changeset: 7:42abbb61bede | tag: tip | user: test | date: Thu Jan 01 00:00:07 1970 +0000 | summary: does not commute with e | o changeset: 6:dd184f2faeb0 | user: test | date: Thu Jan 01 00:00:06 1970 +0000 | summary: f | o changeset: 5:7f3755409b00 | user: test | date: Thu Jan 01 00:00:05 1970 +0000 | summary: e | o changeset: 4:ae78f4c9d74f | user: test | date: Thu Jan 01 00:00:04 1970 +0000 | summary: d | o changeset: 3:092e4ce14829 | user: test | date: Thu Jan 01 00:00:03 1970 +0000 | summary: c | o changeset: 2:40ccdd8beb95 | user: test | date: Thu Jan 01 00:00:02 1970 +0000 | summary: b | o changeset: 1:cd997a145b29 | user: test | date: Thu Jan 01 00:00:01 1970 +0000 | summary: a | o changeset: 0:1715188a53c7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Initial commit edit the history $ hg histedit 3 --commands $EDITED 2>&1 | fixbundle merging e warning: conflicts while merging e! (edit, then use 'hg resolve --mark') Fix up the change (fold 42abbb61bede) (hg histedit --continue to resume) fix up $ echo 'I can haz no commute' > e $ hg resolve --mark e (no more unresolved files) continue: hg histedit --continue $ HGEDITOR=cat hg histedit --continue 2>&1 | fixbundle | grep -v '2 files removed' d *** does not commute with e HG: Enter commit message. Lines beginning with 'HG:' are removed. HG: Leave message empty to abort commit. HG: -- HG: user: test HG: branch 'default' HG: changed d HG: changed e merging e warning: conflicts while merging e! (edit, then use 'hg resolve --mark') Fix up the change (pick 7f3755409b00) (hg histedit --continue to resume) just continue this time keep the non-commuting change, and thus the pending change will be dropped $ hg revert -r 'p1()' e $ hg resolve --mark e (no more unresolved files) continue: hg histedit --continue $ hg diff $ hg histedit --continue 2>&1 | fixbundle 7f3755409b00: skipping changeset (no changes) log after edit $ hg log --graph @ changeset: 5:1300355b1a54 | tag: tip | user: test | date: Thu Jan 01 00:00:06 1970 +0000 | summary: f | o changeset: 4:e2ac33269083 | user: test | date: Thu Jan 01 00:00:07 1970 +0000 | summary: d | o changeset: 3:092e4ce14829 | user: test | date: Thu Jan 01 00:00:03 1970 +0000 | summary: c | o changeset: 2:40ccdd8beb95 | user: test | date: Thu Jan 01 00:00:02 1970 +0000 | summary: b | o changeset: 1:cd997a145b29 | user: test | date: Thu Jan 01 00:00:01 1970 +0000 | summary: a | o changeset: 0:1715188a53c7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Initial commit contents of e $ hg cat e I can haz no commute manifest $ hg manifest a b c d e f $ cd .. Repeat test using "roll", not "fold". "roll" folds in changes but drops message and date $ initrepo r2 $ cd r2 Initial generation of the command files $ EDITED="$TESTTMP/editedhistory.2" $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 3 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 4 >> $EDITED $ hg log --template 'roll {node|short} {rev} {desc}\n' -r 7 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 5 >> $EDITED $ hg log --template 'pick {node|short} {rev} {desc}\n' -r 6 >> $EDITED $ cat $EDITED pick 092e4ce14829 3 c pick ae78f4c9d74f 4 d roll 42abbb61bede 7 does not commute with e pick 7f3755409b00 5 e pick dd184f2faeb0 6 f log before edit $ hg log --graph @ changeset: 7:42abbb61bede | tag: tip | user: test | date: Thu Jan 01 00:00:07 1970 +0000 | summary: does not commute with e | o changeset: 6:dd184f2faeb0 | user: test | date: Thu Jan 01 00:00:06 1970 +0000 | summary: f | o changeset: 5:7f3755409b00 | user: test | date: Thu Jan 01 00:00:05 1970 +0000 | summary: e | o changeset: 4:ae78f4c9d74f | user: test | date: Thu Jan 01 00:00:04 1970 +0000 | summary: d | o changeset: 3:092e4ce14829 | user: test | date: Thu Jan 01 00:00:03 1970 +0000 | summary: c | o changeset: 2:40ccdd8beb95 | user: test | date: Thu Jan 01 00:00:02 1970 +0000 | summary: b | o changeset: 1:cd997a145b29 | user: test | date: Thu Jan 01 00:00:01 1970 +0000 | summary: a | o changeset: 0:1715188a53c7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Initial commit edit the history $ hg histedit 3 --commands $EDITED 2>&1 | fixbundle merging e warning: conflicts while merging e! (edit, then use 'hg resolve --mark') Fix up the change (roll 42abbb61bede) (hg histedit --continue to resume) fix up $ echo 'I can haz no commute' > e $ hg resolve --mark e (no more unresolved files) continue: hg histedit --continue $ hg histedit --continue 2>&1 | fixbundle | grep -v '2 files removed' merging e warning: conflicts while merging e! (edit, then use 'hg resolve --mark') Fix up the change (pick 7f3755409b00) (hg histedit --continue to resume) just continue this time $ hg revert -r 'p1()' e $ hg resolve --mark e (no more unresolved files) continue: hg histedit --continue $ hg histedit --continue 2>&1 | fixbundle 7f3755409b00: skipping changeset (no changes) log after edit $ hg log --graph @ changeset: 5:b538bcb461be | tag: tip | user: test | date: Thu Jan 01 00:00:06 1970 +0000 | summary: f | o changeset: 4:317e37cb6d66 | user: test | date: Thu Jan 01 00:00:04 1970 +0000 | summary: d | o changeset: 3:092e4ce14829 | user: test | date: Thu Jan 01 00:00:03 1970 +0000 | summary: c | o changeset: 2:40ccdd8beb95 | user: test | date: Thu Jan 01 00:00:02 1970 +0000 | summary: b | o changeset: 1:cd997a145b29 | user: test | date: Thu Jan 01 00:00:01 1970 +0000 | summary: a | o changeset: 0:1715188a53c7 user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: Initial commit contents of e $ hg cat e I can haz no commute manifest $ hg manifest a b c d e f description is taken from rollup target commit $ hg log --debug --rev 4 changeset: 4:317e37cb6d66c1c84628c00e5bf4c8c292831951 phase: draft parent: 3:092e4ce14829f4974399ce4316d59f64ef0b6725 parent: -1:0000000000000000000000000000000000000000 manifest: 4:b068a323d969f22af1296ec6a5ea9384cef437ac user: test date: Thu Jan 01 00:00:04 1970 +0000 files: d e extra: branch=default extra: histedit_source=ae78f4c9d74ffa4b6cb5045001c303fe9204e890,42abbb61bede6f4366fa1e74a664343e5d558a70 description: d done with repo r2 $ cd ..