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view tests/test-convert-svn-encoding.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 | a915db9a5e77 |
children | 75b59d221aa3 |
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#require svn svn-bindings $ cat >> $HGRCPATH <<EOF > [extensions] > convert = > EOF $ svnadmin create svn-repo $ svnadmin load -q svn-repo < "$TESTDIR/svn/encoding.svndump" Convert while testing all possible outputs $ hg --debug convert svn-repo A-hg --config progress.debug=1 initializing destination A-hg repository reparent to file:/*/$TESTTMP/svn-repo (glob) run hg sink pre-conversion action scanning source... found trunk at 'trunk' found tags at 'tags' found branches at 'branches' found branch branch\xc3\xa9 at 5 (esc) found branch branch\xc3\xa9e at 6 (esc) scanning: 1/4 revisions (25.00%) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) fetching revision log for "/trunk" from 4 to 0 parsing revision 4 (2 changes) parsing revision 3 (4 changes) parsing revision 2 (3 changes) parsing revision 1 (3 changes) no copyfrom path, don't know what to do. '/branches' is not under '/trunk', ignoring '/tags' is not under '/trunk', ignoring scanning: 2/4 revisions (50.00%) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob) fetching revision log for "/branches/branch\xc3\xa9" from 5 to 0 (esc) parsing revision 5 (1 changes) reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob) found parent of branch /branches/branch\xc3\xa9 at 4: /trunk (esc) scanning: 3/4 revisions (75.00%) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob) fetching revision log for "/branches/branch\xc3\xa9e" from 6 to 0 (esc) parsing revision 6 (1 changes) reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob) found parent of branch /branches/branch\xc3\xa9e at 5: /branches/branch\xc3\xa9 (esc) scanning: 4/4 revisions (100.00%) scanning: 5/4 revisions (125.00%) scanning: 6/4 revisions (150.00%) sorting... converting... 5 init projA source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@1 converting: 0/6 revisions (0.00%) reusing manifest from p1 (no file change) committing changelog updating the branch cache 4 hello source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@2 converting: 1/6 revisions (16.67%) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) scanning paths: /trunk/\xc3\xa0 0/3 paths (0.00%) (esc) scanning paths: /trunk/\xc3\xa0/e\xcc\x81 1/3 paths (33.33%) (esc) scanning paths: /trunk/\xc3\xa9 2/3 paths (66.67%) (esc) committing files: \xc3\xa0/e\xcc\x81 (esc) getting files: \xc3\xa0/e\xcc\x81 1/2 files (50.00%) (esc) \xc3\xa9 (esc) getting files: \xc3\xa9 2/2 files (100.00%) (esc) committing manifest committing changelog updating the branch cache 3 copy files source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@3 converting: 2/6 revisions (33.33%) scanning paths: /trunk/\xc3\xa0 0/4 paths (0.00%) (esc) gone from -1 reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) scanning paths: /trunk/\xc3\xa8 1/4 paths (25.00%) (esc) copied to \xc3\xa8 from \xc3\xa9@2 (esc) scanning paths: /trunk/\xc3\xa9 2/4 paths (50.00%) (esc) gone from -1 reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) scanning paths: /trunk/\xc3\xb9 3/4 paths (75.00%) (esc) mark /trunk/\xc3\xb9 came from \xc3\xa0:2 (esc) getting files: \xc3\xa0/e\xcc\x81 1/4 files (25.00%) (esc) getting files: \xc3\xa9 2/4 files (50.00%) (esc) committing files: \xc3\xa8 (esc) getting files: \xc3\xa8 3/4 files (75.00%) (esc) \xc3\xa8: copy \xc3\xa9:6b67ccefd5ce6de77e7ead4f5292843a0255329f (esc) \xc3\xb9/e\xcc\x81 (esc) getting files: \xc3\xb9/e\xcc\x81 4/4 files (100.00%) (esc) \xc3\xb9/e\xcc\x81: copy \xc3\xa0/e\xcc\x81:a9092a3d84a37b9993b5c73576f6de29b7ea50f6 (esc) committing manifest committing changelog updating the branch cache 2 remove files source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/trunk@4 converting: 3/6 revisions (50.00%) scanning paths: /trunk/\xc3\xa8 0/2 paths (0.00%) (esc) gone from -1 reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) scanning paths: /trunk/\xc3\xb9 1/2 paths (50.00%) (esc) gone from -1 reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/trunk (glob) getting files: \xc3\xa8 1/2 files (50.00%) (esc) getting files: \xc3\xb9/e\xcc\x81 2/2 files (100.00%) (esc) committing files: committing manifest committing changelog updating the branch cache 1 branch to branch? source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/branches/branch?@5 converting: 4/6 revisions (66.67%) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9 (glob) scanning paths: /branches/branch\xc3\xa9 0/1 paths (0.00%) (esc) reusing manifest from p1 (no file change) committing changelog updating the branch cache 0 branch to branch?e source: svn:afeb9c47-92ff-4c0c-9f72-e1f6eb8ac9af/branches/branch?e@6 converting: 5/6 revisions (83.33%) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob) scanning paths: /branches/branch\xc3\xa9e 0/1 paths (0.00%) (esc) reusing manifest from p1 (no file change) committing changelog updating the branch cache reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob) reparent to file:/*/$TESTTMP/svn-repo (glob) reparent to file:/*/$TESTTMP/svn-repo/branches/branch%C3%A9e (glob) updating tags committing files: .hgtags committing manifest committing changelog updating the branch cache run hg sink post-conversion action $ cd A-hg $ hg up 1 files updated, 0 files merged, 0 files removed, 0 files unresolved Check tags are in UTF-8 $ cat .hgtags e94e4422020e715add80525e8f0f46c9968689f1 branch\xc3\xa9e (esc) f7e66f98380ed1e53a797c5c7a7a2616a7ab377d branch\xc3\xa9 (esc) $ cd ..