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view tests/test-update-names.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 | c8514f858788 |
children |
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Test update logic when there are renames or weird same-name cases between dirs and files Update with local changes across a file rename $ hg init r1 && cd r1 $ echo a > a $ hg add a $ hg ci -m a $ hg mv a b $ hg ci -m rename $ echo b > b $ hg ci -m change $ hg up -q 0 $ echo c > a $ hg up merging a and b to b warning: conflicts while merging b! (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 [1] Test update when local untracked directory exists with the same name as a tracked file in a commit we are updating to $ hg init r2 && cd r2 $ echo root > root && hg ci -Am root # rev 0 adding root $ echo text > name && hg ci -Am "name is a file" # rev 1 adding name $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkdir name $ hg up 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Test update when local untracked directory exists with some files in it and has the same name a tracked file in a commit we are updating to. In future this should be updated to give an friendlier error message, but now we should just make sure that this does not erase untracked data $ hg up 0 0 files updated, 0 files merged, 1 files removed, 0 files unresolved $ mkdir name $ echo text > name/file $ hg st ? name/file $ hg up 1 abort: Unlinking directory not permitted: *$TESTTMP/r1/r2/name* (glob) (windows !) abort: Directory not empty: '?\$TESTTMP/r1/r2/name'? (re) (no-windows !) [255] $ cat name/file text $ cd .. #if symlink Test update when two commits have symlinks that point to different folders $ hg init r3 && cd r3 $ echo root > root && hg ci -Am root adding root $ mkdir folder1 && mkdir folder2 $ ln -s folder1 folder $ hg ci -Am "symlink to folder1" adding folder $ rm folder $ ln -s folder2 folder $ hg ci -Am "symlink to folder2" $ hg up 1 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd .. #endif #if rmcwd Test that warning is printed if cwd is deleted during update $ hg init r4 && cd r4 $ mkdir dir $ cd dir $ echo a > a $ echo b > b $ hg add a b $ hg ci -m "file and dir" $ hg up -q null current directory was removed (consider changing to repo root: $TESTTMP/r1/r4) #endif