Mercurial > hg
view tests/test-bookflow.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 | 3de4f17f4824 |
children | d7304434390f |
line wrap: on
line source
initialize $ make_changes() { > d=`pwd` > [ ! -z $1 ] && cd $1 > echo "test `basename \`pwd\``" >> test > hg commit -Am"${2:-test}" > r=$? > cd $d > return $r > } $ ls -1a . .. $ hg init a $ cd a $ echo 'test' > test; hg commit -Am'test' adding test clone to b $ mkdir ../b $ cd ../b $ hg clone ../a . updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo "[extensions]" >> .hg/hgrc $ echo "bookflow=" >> .hg/hgrc $ hg branch X abort: creating named branches is disabled and you should use bookmarks (see 'hg help bookflow') [255] $ hg bookmark X $ hg bookmarks * X 0:* (glob) $ hg bookmark X abort: bookmark X already exists, to move use the --rev option [255] $ make_changes $ hg push ../a -q $ hg bookmarks \* X 1:* (glob) change a $ cd ../a $ hg up 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ echo 'test' >> test; hg commit -Am'test' pull in b $ cd ../b $ hg pull -u pulling from $TESTTMP/a searching for changes adding changesets adding manifests adding file changes added 1 changesets with 1 changes to 1 files new changesets * (glob) 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (leaving bookmark X) $ hg status $ hg bookmarks X 1:* (glob) check protection of @ bookmark $ hg bookmark @ $ hg bookmarks \* @ 2:* (glob) X 1:* (glob) $ make_changes abort: cannot commit, bookmark @ is protected [255] $ hg status M test $ hg bookmarks \* @ 2:* (glob) X 1:* (glob) $ hg --config bookflow.protect= commit -Am"Updated test" $ hg bookmarks \* @ 3:* (glob) X 1:* (glob) check requirement for an active bookmark $ hg bookmark -i $ hg bookmarks @ 3:* (glob) X 1:* (glob) $ make_changes abort: cannot commit without an active bookmark [255] $ hg revert test $ rm test.orig $ hg status make the bookmark move by updating it on a, and then pulling # add a commit to a $ cd ../a $ hg bookmark X $ hg bookmarks \* X 2:* (glob) $ make_changes $ hg bookmarks * X 3:81af7977fdb9 # go back to b, and check out X $ cd ../b $ hg up X 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (activating bookmark X) $ hg bookmarks @ 3:* (glob) \* X 1:* (glob) # pull, this should move the bookmark forward, because it was changed remotely $ hg pull -u | grep "updating to active bookmark X" updating to active bookmark X $ hg bookmarks @ 3:* (glob) * X 4:81af7977fdb9 the bookmark should not move if it diverged from remote $ hg -R ../a status $ hg -R ../b status $ make_changes ../a $ make_changes ../b $ hg -R ../a status $ hg -R ../b status $ hg -R ../a bookmarks * X 4:238292f60a57 $ hg -R ../b bookmarks @ 3:* (glob) * X 5:096f7e86892d $ cd ../b $ # make sure we cannot push after bookmarks diverged $ hg push -B X | grep abort abort: push creates new remote head * with bookmark 'X'! (glob) (pull and merge or see 'hg help push' for details about pushing new heads) [1] $ hg pull -u | grep divergent divergent bookmark X stored as X@default 1 other divergent bookmarks for "X" $ hg bookmarks @ 3:* (glob) * X 5:096f7e86892d X@default 6:238292f60a57 $ hg id -in 096f7e86892d 5 $ make_changes $ hg status $ hg bookmarks @ 3:* (glob) * X 7:227f941aeb07 X@default 6:238292f60a57 now merge with the remote bookmark $ hg merge X@default --tool :local -q $ hg status M test $ hg commit -m"Merged with X@default" $ hg bookmarks @ 3:* (glob) * X 8:26fed9bb3219 $ hg push -B X | grep bookmark pushing to $TESTTMP/a (?) updating bookmark X $ cd ../a $ hg up -q $ hg bookmarks * X 7:26fed9bb3219 test hg pull when there is more than one descendant $ cd ../a $ hg bookmark Z $ hg bookmark Y $ make_changes . YY $ hg up Z -q $ make_changes . ZZ created new head $ hg bookmarks X 7:26fed9bb3219 Y 8:131e663dbd2a * Z 9:b74a4149df25 $ hg log -r 'p1(Y)' -r 'p1(Z)' -T '{rev}\n' # prove that Y and Z share the same parent 7 $ hg log -r 'Y%Z' -T '{rev}\n' # revs in Y but not in Z 8 $ hg log -r 'Z%Y' -T '{rev}\n' # revs in Z but not in Y 9 $ cd ../b $ hg pull -uq $ hg id b74a4149df25 tip Z $ hg bookmarks | grep \* # no active bookmark [1] test shelving $ cd ../a $ echo anotherfile > anotherfile # this change should not conflict $ hg add anotherfile $ hg commit -m"Change in a" $ cd ../b $ hg up Z | grep Z (activating bookmark Z) $ hg book | grep \* # make sure active bookmark \* Z 10:* (glob) $ echo "test b" >> test $ hg diff --stat test | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) $ hg shelve shelved as Z 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg pull -uq $ hg unshelve unshelving change 'Z' rebasing shelved changes $ hg diff --stat test | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) make the bookmark move by updating it on a, and then pulling with a local change # add a commit to a $ cd ../a $ hg up -C X |fgrep "activating bookmark X" (activating bookmark X) # go back to b, and check out X $ cd ../b $ hg up -C X |fgrep "activating bookmark X" (activating bookmark X) # update and push from a $ make_changes ../a created new head $ echo "more" >> test $ hg pull -u 2>&1 | fgrep -v TESTTMP| fgrep -v "searching for changes" | fgrep -v adding pulling from $TESTTMP/a added 1 changesets with 0 changes to 0 files (+1 heads) updating bookmark X new changesets * (glob) updating to active bookmark X merging test warning: conflicts while merging test! (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 $ hg update -Cq $ rm test.orig make sure that commits aren't possible if working directory is not pointing to active bookmark $ hg -R ../a status $ hg -R ../b status $ hg -R ../a id -i 36a6e592ec06 $ hg -R ../a book | grep X \* X \d+:36a6e592ec06 (re) $ hg -R ../b id -i 36a6e592ec06 $ hg -R ../b book | grep X \* X \d+:36a6e592ec06 (re) $ make_changes ../a $ hg -R ../a book | grep X \* X \d+:f73a71c992b8 (re) $ cd ../b $ hg pull 2>&1 | grep -v add | grep -v pulling | grep -v searching | grep -v changeset updating bookmark X (run 'hg update' to get a working copy) working directory out of sync with active bookmark, run 'hg up X' $ hg id -i # we're still on the old commit 36a6e592ec06 $ hg book | grep X # while the bookmark moved \* X \d+:f73a71c992b8 (re) $ make_changes abort: cannot commit, working directory out of sync with active bookmark (run 'hg up X') [255] $ hg up -Cq -r . # cleanup local changes $ hg status $ hg id -i # we're still on the old commit 36a6e592ec06 $ hg up X -q $ hg id -i # now we're on X f73a71c992b8 $ hg book | grep X \* X \d+:f73a71c992b8 (re)