Mercurial > hg
view tests/test-absorb-rename.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 | 31dfa7dac4c9 |
children |
line wrap: on
line source
$ cat >> $HGRCPATH << EOF > [diff] > git=1 > [extensions] > absorb= > EOF $ sedi() { # workaround check-code > pattern="$1" > shift > for i in "$@"; do > sed "$pattern" "$i" > "$i".tmp > mv "$i".tmp "$i" > done > } rename a to b, then b to a $ hg init repo1 $ cd repo1 $ echo 1 > a $ hg ci -A a -m 1 $ hg mv a b $ echo 2 >> b $ hg ci -m 2 $ hg mv b a $ echo 3 >> a $ hg ci -m 3 $ hg annotate -ncf a 0 eff892de26ec a: 1 1 bf56e1f4f857 b: 2 2 0b888b00216c a: 3 $ sedi 's/$/a/' a $ hg absorb -apq showing changes for a @@ -0,3 +0,3 @@ eff892d -1 bf56e1f -2 0b888b0 -3 eff892d +1a bf56e1f +2a 0b888b0 +3a 3 changesets affected 0b888b0 3 bf56e1f 2 eff892d 1 $ hg status $ hg annotate -ncf a 0 5d1c5620e6f2 a: 1a 1 9a14ffe67ae9 b: 2a 2 9191d121a268 a: 3a when the first changeset is public $ hg phase --public -r 0 $ sedi 's/a/A/' a $ hg absorb -apq showing changes for a @@ -0,3 +0,3 @@ -1a 9a14ffe -2a 9191d12 -3a +1A 9a14ffe +2A 9191d12 +3A 2 changesets affected 9191d12 3 9a14ffe 2 $ hg diff diff --git a/a b/a --- a/a +++ b/a @@ -1,3 +1,3 @@ -1a +1A 2A 3A copy a to b $ cd .. $ hg init repo2 $ cd repo2 $ echo 1 > a $ hg ci -A a -m 1 $ hg cp a b $ echo 2 >> b $ hg ci -m 2 $ hg log -T '{rev}:{node|short} {desc}\n' 1:17b72129ab68 2 0:eff892de26ec 1 $ sedi 's/$/a/' a $ sedi 's/$/b/' b $ hg absorb -apq showing changes for a @@ -0,1 +0,1 @@ eff892d -1 eff892d +1a showing changes for b @@ -0,2 +0,2 @@ -1 17b7212 -2 +1b 17b7212 +2b 2 changesets affected 17b7212 2 eff892d 1 $ hg diff diff --git a/b b/b --- a/b +++ b/b @@ -1,2 +1,2 @@ -1 +1b 2b copy b to a $ cd .. $ hg init repo3 $ cd repo3 $ echo 1 > b $ hg ci -A b -m 1 $ hg cp b a $ echo 2 >> a $ hg ci -m 2 $ hg log -T '{rev}:{node|short} {desc}\n' 1:e62c256d8b24 2 0:55105f940d5c 1 $ sedi 's/$/a/' a $ sedi 's/$/a/' b $ hg absorb -apq showing changes for a @@ -0,2 +0,2 @@ -1 e62c256 -2 +1a e62c256 +2a showing changes for b @@ -0,1 +0,1 @@ 55105f9 -1 55105f9 +1a 2 changesets affected e62c256 2 55105f9 1 $ hg diff diff --git a/a b/a --- a/a +++ b/a @@ -1,2 +1,2 @@ -1 +1a 2a "move" b to both a and c, follow a - sorted alphabetically $ cd .. $ hg init repo4 $ cd repo4 $ echo 1 > b $ hg ci -A b -m 1 $ hg cp b a $ hg cp b c $ hg rm b $ echo 2 >> a $ echo 3 >> c $ hg commit -m cp $ hg log -T '{rev}:{node|short} {desc}\n' 1:366daad8e679 cp 0:55105f940d5c 1 $ sedi 's/$/a/' a $ sedi 's/$/c/' c $ hg absorb -apq showing changes for a @@ -0,2 +0,2 @@ 55105f9 -1 366daad -2 55105f9 +1a 366daad +2a showing changes for c @@ -0,2 +0,2 @@ -1 366daad -3 +1c 366daad +3c 2 changesets affected 366daad cp 55105f9 1 $ hg log -G -p -T '{rev}:{node|short} {desc}\n' @ 1:70606019f91b cp | diff --git a/b b/a | rename from b | rename to a | --- a/b | +++ b/a | @@ -1,1 +1,2 @@ | 1a | +2a | diff --git a/b b/c | copy from b | copy to c | --- a/b | +++ b/c | @@ -1,1 +1,2 @@ | -1a | +1 | +3c | o 0:bfb67c3539c1 1 diff --git a/b b/b new file mode 100644 --- /dev/null +++ b/b @@ -0,0 +1,1 @@ +1a run absorb again would apply the change to c $ hg absorb -apq showing changes for c @@ -0,1 +0,1 @@ 7060601 -1 7060601 +1c 1 changesets affected 7060601 cp $ hg log -G -p -T '{rev}:{node|short} {desc}\n' @ 1:8bd536cce368 cp | diff --git a/b b/a | rename from b | rename to a | --- a/b | +++ b/a | @@ -1,1 +1,2 @@ | 1a | +2a | diff --git a/b b/c | copy from b | copy to c | --- a/b | +++ b/c | @@ -1,1 +1,2 @@ | -1a | +1c | +3c | o 0:bfb67c3539c1 1 diff --git a/b b/b new file mode 100644 --- /dev/null +++ b/b @@ -0,0 +1,1 @@ +1a "move" b to a, c and d, follow d if a gets renamed to e, and c is deleted $ cd .. $ hg init repo5 $ cd repo5 $ echo 1 > b $ hg ci -A b -m 1 $ hg cp b a $ hg cp b c $ hg cp b d $ hg rm b $ echo 2 >> a $ echo 3 >> c $ echo 4 >> d $ hg commit -m cp $ hg mv a e $ hg rm c $ hg commit -m mv $ hg log -T '{rev}:{node|short} {desc}\n' 2:49911557c471 mv 1:7bc3d43ede83 cp 0:55105f940d5c 1 $ sedi 's/$/e/' e $ sedi 's/$/d/' d $ hg absorb -apq showing changes for d @@ -0,2 +0,2 @@ 55105f9 -1 7bc3d43 -4 55105f9 +1d 7bc3d43 +4d showing changes for e @@ -0,2 +0,2 @@ -1 7bc3d43 -2 +1e 7bc3d43 +2e 2 changesets affected 7bc3d43 cp 55105f9 1 $ hg diff diff --git a/e b/e --- a/e +++ b/e @@ -1,2 +1,2 @@ -1 +1e 2e $ hg log -G -p -T '{rev}:{node|short} {desc}\n' @ 2:34be9b0c786e mv | diff --git a/c b/c | deleted file mode 100644 | --- a/c | +++ /dev/null | @@ -1,2 +0,0 @@ | -1 | -3 | diff --git a/a b/e | rename from a | rename to e | o 1:13e56db5948d cp | diff --git a/b b/a | rename from b | rename to a | --- a/b | +++ b/a | @@ -1,1 +1,2 @@ | -1d | +1 | +2e | diff --git a/b b/c | copy from b | copy to c | --- a/b | +++ b/c | @@ -1,1 +1,2 @@ | -1d | +1 | +3 | diff --git a/b b/d | copy from b | copy to d | --- a/b | +++ b/d | @@ -1,1 +1,2 @@ | 1d | +4d | o 0:0037613a5dc6 1 diff --git a/b b/b new file mode 100644 --- /dev/null +++ b/b @@ -0,0 +1,1 @@ +1d