revset: stop serializing node when using "%ln"
Turning hundred of thousand of node from node to hex and back can be slow… what
about we stop doing it?
In many case were we are using node id we should be using revision id. However
this is not a good reason to have a stupidly slow implementation of "%ln".
This caught my attention again because the phase discovery during push make an
extensive use of "%ln" or huge set. In absolute, that phase discovery probably
should use "%ld" and need to improves its algorithmic complexity, but improving
"%ln" seems simple and long overdue. This greatly speeds up `hg push` on
repository with many drafts.
Here are some relevant poulpe benchmarks:
### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
# benchmark.name = hg.command.push
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.explicit-rev = all-out-heads
# benchmark.variants.issue6528 = disabled
# benchmark.variants.protocol = ssh
# benchmark.variants.reuse-external-delta-parent = default
## benchmark.variants.revs = any-1-extra-rev
before: 44.235070
after: 20.416329 (-53.85%, -23.82)
## benchmark.variants.revs = any-100-extra-rev
before: 49.234697
after: 26.519829 (-46.14%, -22.71)
### benchmark.name = hg.command.bundle
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.revs = all
# benchmark.variants.type = none-streamv2
## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog
before: 10.138396
after: 7.750458 (-23.55%, -2.39)
## data-env-vars.name = mercurial-public-2024-03-22-zstd-sparse-revlog
before: 1.263859
after: 0.700229 (-44.60%, -0.56)
## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
before: 399.484481
after: 346.5089 (-13.26%, -52.98)
## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog
before: 4.540080
after: 3.401700 (-25.07%, -1.14)
## data-env-vars.name = tryton-public-2024-03-22-zstd-sparse-revlog
before: 2.975765
after: 1.870798 (-37.13%, -1.10)
#require no-reposimplestore
$ . "$TESTDIR/narrow-library.sh"
$ hg init master
$ cd master
$ cat >> .hg/hgrc <<EOF
> [narrow]
> serveellipses=True
> EOF
$ for x in `$TESTDIR/seq.py 10`
> do
> echo $x > "f$x"
> hg add "f$x"
> done
$ hg commit -m "Add root files"
$ mkdir d1 d2
$ for x in `$TESTDIR/seq.py 10`
> do
> echo d1/$x > "d1/f$x"
> hg add "d1/f$x"
> echo d2/$x > "d2/f$x"
> hg add "d2/f$x"
> done
$ hg commit -m "Add d1 and d2"
$ for x in `$TESTDIR/seq.py 10`
> do
> echo f$x rev2 > "f$x"
> echo d1/f$x rev2 > "d1/f$x"
> echo d2/f$x rev2 > "d2/f$x"
> hg commit -m "Commit rev2 of f$x, d1/f$x, d2/f$x"
> done
$ cd ..
narrow and shallow clone the d2 directory
$ hg clone --narrow ssh://user@dummy/master shallow --include "d2" --depth 2
requesting all changes
adding changesets
adding manifests
adding file changes
added 4 changesets with 13 changes to 10 files
new changesets *:* (glob)
updating to branch default
10 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd shallow
$ hg log -T '{rev}{if(ellipsis,"...")}: {desc}\n'
3: Commit rev2 of f10, d1/f10, d2/f10
2: Commit rev2 of f9, d1/f9, d2/f9
1: Commit rev2 of f8, d1/f8, d2/f8
0...: Commit rev2 of f7, d1/f7, d2/f7
$ hg update 0
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat d2/f7 d2/f8
d2/f7 rev2
d2/8
$ cd ..
change every upstream file once
$ cd master
$ for x in `$TESTDIR/seq.py 10`
> do
> echo f$x rev3 > "f$x"
> echo d1/f$x rev3 > "d1/f$x"
> echo d2/f$x rev3 > "d2/f$x"
> hg commit -m "Commit rev3 of f$x, d1/f$x, d2/f$x"
> done
$ cd ..
pull new changes with --depth specified. There were 10 changes to the d2
directory but the shallow pull should only fetch 3.
$ cd shallow
$ hg pull --depth 2
pulling from ssh://user@dummy/master
searching for changes
adding changesets
adding manifests
adding file changes
added 4 changesets with 10 changes to 10 files
new changesets *:* (glob)
(run 'hg update' to get a working copy)
$ hg log -T '{rev}{if(ellipsis,"...")}: {desc}\n'
7: Commit rev3 of f10, d1/f10, d2/f10
6: Commit rev3 of f9, d1/f9, d2/f9
5: Commit rev3 of f8, d1/f8, d2/f8
4...: Commit rev3 of f7, d1/f7, d2/f7
3: Commit rev2 of f10, d1/f10, d2/f10
2: Commit rev2 of f9, d1/f9, d2/f9
1: Commit rev2 of f8, d1/f8, d2/f8
0...: Commit rev2 of f7, d1/f7, d2/f7
$ hg update 4
10 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat d2/f7 d2/f8
d2/f7 rev3
d2/f8 rev2
$ hg update 7
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cat d2/f10
d2/f10 rev3
$ cd ..
cannot clone with zero or negative depth
$ hg clone --narrow ssh://user@dummy/master bad --include "d2" --depth 0
requesting all changes
remote: abort: depth must be positive, got 0
abort: pull failed on remote
[100]
$ hg clone --narrow ssh://user@dummy/master bad --include "d2" --depth -1
requesting all changes
remote: abort: depth must be positive, got -1
abort: pull failed on remote
[100]