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view tests/test-mailmap.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 | 8e57c3b0dce4 |
children |
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Create a repo and add some commits $ hg init mm $ cd mm $ echo "Test content" > testfile1 $ hg add testfile1 $ hg commit -m "First commit" -u "Proper <commit@m.c>" $ echo "Test content 2" > testfile2 $ hg add testfile2 $ hg commit -m "Second commit" -u "Commit Name 2 <commit2@m.c>" $ echo "Test content 3" > testfile3 $ hg add testfile3 $ hg commit -m "Third commit" -u "Commit Name 3 <commit3@m.c>" $ echo "Test content 4" > testfile4 $ hg add testfile4 $ hg commit -m "Fourth commit" -u "Commit Name 4 <commit4@m.c>" Add a .mailmap file with each possible entry type plus comments $ cat > .mailmap << EOF > # Comment shouldn't break anything > <proper@m.c> <commit@m.c> # Should update email only > Proper Name 2 <commit2@m.c> # Should update name only > Proper Name 3 <proper@m.c> <commit3@m.c> # Should update name, email due to email > Proper Name 4 <proper@m.c> Commit Name 4 <commit4@m.c> # Should update name, email due to name, email > EOF $ hg add .mailmap $ hg commit -m "Add mailmap file" -u "Testuser <test123@m.c>" Output of commits should be normal without filter $ hg log -T "{author}\n" -r "all()" Proper <commit@m.c> Commit Name 2 <commit2@m.c> Commit Name 3 <commit3@m.c> Commit Name 4 <commit4@m.c> Testuser <test123@m.c> Output of commits with filter shows their mailmap values $ hg log -T "{mailmap(author)}\n" -r "all()" Proper <proper@m.c> Proper Name 2 <commit2@m.c> Proper Name 3 <proper@m.c> Proper Name 4 <proper@m.c> Testuser <test123@m.c> Add new mailmap entry for testuser $ cat >> .mailmap << EOF > <newmmentry@m.c> <test123@m.c> > EOF Output of commits with filter shows their updated mailmap values $ hg log -T "{mailmap(author)}\n" -r "all()" Proper <proper@m.c> Proper Name 2 <commit2@m.c> Proper Name 3 <proper@m.c> Proper Name 4 <proper@m.c> Testuser <newmmentry@m.c> A commit with improperly formatted user field should not break the filter $ echo "some more test content" > testfile1 $ hg commit -m "Commit with improper user field" -u "Improper user" $ hg log -T "{mailmap(author)}\n" -r "all()" Proper <proper@m.c> Proper Name 2 <commit2@m.c> Proper Name 3 <proper@m.c> Proper Name 4 <proper@m.c> Testuser <newmmentry@m.c> Improper user No TypeError beacause of invalid input $ hg log -T '{mailmap(termwidth)}\n' -r0 80