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-windows
$ . "$TESTDIR/remotefilelog-library.sh"
$ hg init master
$ cd master
$ cat >> .hg/hgrc <<EOF
> [remotefilelog]
> server=True
> EOF
$ echo x > x
$ echo z > z
$ hg commit -qAm x1
$ echo x2 > x
$ echo z2 > z
$ hg commit -qAm x2
$ hg bookmark foo
$ cd ..
# prefetch a revision w/ a sparse checkout
$ hgcloneshallow ssh://user@dummy/master shallow --noupdate
streaming all changes
3 files to transfer, 527 bytes of data (no-zstd !)
transferred 527 bytes in * seconds (* */sec) (glob) (no-zstd !)
3 files to transfer, 534 bytes of data (zstd no-rust !)
transferred 534 bytes in * seconds (* */sec) (glob) (zstd no-rust !)
5 files to transfer, 660 bytes of data (zstd rust !)
transferred 660 bytes in * seconds (*/sec) (glob) (zstd rust !)
searching for changes
no changes found
$ cd shallow
$ printf "[extensions]\nsparse=\n" >> .hg/hgrc
$ hg debugsparse -I x
$ hg prefetch -r 0
1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
$ hg cat -r 0 x
x
$ hg debugsparse -I z
$ hg prefetch -r 0
1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
$ hg cat -r 0 z
z
# prefetch sparse only on pull when configured
$ printf "[remotefilelog]\npullprefetch=bookmark()\n" >> .hg/hgrc
$ hg strip tip
saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/876b1317060d-b2e91d8d-backup.hg (glob)
2 files fetched over 2 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
$ hg debugsparse --delete z
$ clearcache
$ hg pull
pulling from ssh://user@dummy/master
searching for changes
adding changesets
adding manifests
adding file changes
updating bookmark foo
added 1 changesets with 0 changes to 0 files
new changesets 876b1317060d
(run 'hg update' to get a working copy)
prefetching file contents
1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
# Dont consider filtered files when doing copy tracing
## Push an unrelated commit
$ cd ../
$ hgcloneshallow ssh://user@dummy/master shallow2
streaming all changes
3 files to transfer, 527 bytes of data (no-zstd !)
transferred 527 bytes in * seconds (*) (glob) (no-zstd !)
3 files to transfer, 534 bytes of data (zstd no-rust !)
transferred 534 bytes in * seconds (* */sec) (glob) (zstd no-rust !)
5 files to transfer, 660 bytes of data (zstd rust !)
transferred 660 bytes in * seconds (*/sec) (glob) (zstd rust !)
searching for changes
no changes found
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
$ cd shallow2
$ printf "[extensions]\nsparse=\n" >> .hg/hgrc
$ hg up -q 0
2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
$ touch a
$ hg ci -Aqm a
$ hg push -q -f
## Pull the unrelated commit and rebase onto it - verify unrelated file was not
pulled
$ cd ../shallow
$ hg up -q 1
$ hg pull -q
$ hg debugsparse -I z
$ clearcache
$ hg prefetch -r '. + .^' -I x -I z
4 files fetched over 1 fetches - (4 misses, 0.00% hit ratio) over * (glob)
$ hg rebase -d 2 --keep
rebasing 1:876b1317060d foo "x2"