Mercurial > hg
view tests/test-unamend.t @ 44363:f7459da77f23
nodemap: introduce an option to use mmap to read the nodemap mapping
The performance and memory benefit is much greater if we don't have to copy all
the data in memory for each information. So we introduce an option (on by
default) to read the data using mmap.
This changeset is the last one definition the API for index support nodemap
data. (they have to be able to use the mmaping).
Below are some benchmark comparing the best we currently have in 5.3 with the
final step of this series (using the persistent nodemap implementation in
Rust). The benchmark run `hg perfindex` with various revset and the following
variants:
Before:
* do not use the persistent nodemap
* use the CPython implementation of the index for nodemap
* use mmapping of the changelog index
After:
* use the MixedIndex Rust code, with the NodeTree object for nodemap access
(still in review)
* use the persistent nodemap data from disk
* access the persistent nodemap data through mmap
* use mmapping of the changelog index
The persistent nodemap greatly speed up most operation on very large
repositories. Some of the previously very fast lookup end up a bit slower because
the persistent nodemap has to be setup. However the absolute slowdown is very
small and won't matters in the big picture.
Here are some numbers (in seconds) for the reference copy of mozilla-try:
Revset Before After abs-change speedup
-10000: 0.004622 0.005532 0.000910 × 0.83
-10: 0.000050 0.000132 0.000082 × 0.37
tip 0.000052 0.000085 0.000033 × 0.61
0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29
0 0.023521 0.000084 -0.023437 × 280.01
(-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37
(-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79
(-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55
:99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84
:9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68
:9 0.316450 0.000143 -0.316307 ×2212.93
On smaller repositories, the cost of nodemap related operation is not as big, so
the win is much more modest. Yet it helps shaving a handful of millisecond here
and there.
Here are some numbers (in seconds) for the reference copy of mercurial:
Revset Before After abs-change speedup
-10: 0.000065 0.000097 0.000032 × 0.67
tip 0.000063 0.000078 0.000015 × 0.80
0 0.000561 0.000079 -0.000482 × 7.10
-10000: 0.004609 0.003648 -0.000961 × 1.26
0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35
(-10:) + :9 0.002187 0.000108 -0.002079 ×20.25
(-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68
(-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71
:9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96
:9 0.003854 0.000099 -0.003755 ×38.92
:99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02
Differential Revision: https://phab.mercurial-scm.org/D7894
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 11 Feb 2020 11:18:52 +0100 |
parents | e77b57e09bfa |
children | 976b26bdd0d8 |
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Test for command `hg unamend` which lives in uncommit extension =============================================================== $ cat >> $HGRCPATH << EOF > [alias] > glog = log -G -T '{rev}:{node|short} {desc}' > [experimental] > evolution = createmarkers, allowunstable > [extensions] > rebase = > amend = > uncommit = > EOF Repo Setup $ hg init repo $ cd repo $ for ch in a b c d e f g h; do touch $ch; echo "foo" >> $ch; hg ci -Aqm "Added "$ch; done $ hg glog @ 7:ec2426147f0e Added h | o 6:87d6d6676308 Added g | o 5:825660c69f0c Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a Trying to unamend when there was no amend done $ hg unamend abort: changeset must have one predecessor, found 0 predecessors [255] Unamend on clean wdir and tip $ echo "bar" >> h $ hg amend $ hg exp # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID c9fa1a715c1b7661c0fafb362a9f30bd75878d7d # Parent 87d6d66763085b629e6d7ed56778c79827273022 Added h diff -r 87d6d6676308 -r c9fa1a715c1b h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/h Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,2 @@ +foo +bar $ hg glog --hidden @ 8:c9fa1a715c1b Added h | | x 7:ec2426147f0e Added h |/ o 6:87d6d6676308 Added g | o 5:825660c69f0c Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a $ hg unamend $ hg glog --hidden @ 9:46d02d47eec6 Added h | | x 8:c9fa1a715c1b Added h |/ | x 7:ec2426147f0e Added h |/ o 6:87d6d6676308 Added g | o 5:825660c69f0c Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a $ hg diff diff -r 46d02d47eec6 h --- a/h Thu Jan 01 00:00:00 1970 +0000 +++ b/h Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +1,2 @@ foo +bar $ hg exp # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 46d02d47eec6ca096b8dcab3f8f5579c40c3dd9a # Parent 87d6d66763085b629e6d7ed56778c79827273022 Added h diff -r 87d6d6676308 -r 46d02d47eec6 h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/h Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,1 @@ +foo $ hg status M h $ hg log -r . -T '{extras % "{extra}\n"}' --config alias.log=log branch=default unamend_source=c9fa1a715c1b7661c0fafb362a9f30bd75878d7d Using unamend to undo an unamed (intentional) $ hg unamend $ hg exp # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 850ddfc1bc662997ec6094ada958f01f0cc8070a # Parent 87d6d66763085b629e6d7ed56778c79827273022 Added h diff -r 87d6d6676308 -r 850ddfc1bc66 h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/h Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,2 @@ +foo +bar $ hg diff Unamend on a dirty working directory $ echo "bar" >> a $ hg amend $ echo "foobar" >> a $ echo "bar" >> b $ hg status M a M b $ hg unamend $ hg status M a M b $ hg diff diff -r ec338db45d51 a --- a/a Thu Jan 01 00:00:00 1970 +0000 +++ b/a Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +1,3 @@ foo +bar +foobar diff -r ec338db45d51 b --- a/b Thu Jan 01 00:00:00 1970 +0000 +++ b/b Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +1,2 @@ foo +bar Unamending an added file $ hg ci -m "Added things to a and b" $ echo foo > bar $ hg add bar $ hg amend $ hg unamend $ hg status A bar $ hg revert --all forgetting bar Unamending a removed file $ hg remove a $ hg amend $ hg unamend $ hg status R a ? bar $ hg revert --all undeleting a Unamending an added file with dirty wdir status $ hg add bar $ hg amend $ echo bar >> bar $ hg status M bar $ hg unamend $ hg status A bar $ hg diff diff -r 7f79409af972 bar --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/bar Thu Jan 01 00:00:00 1970 +0000 @@ -0,0 +1,2 @@ +foo +bar $ hg revert --all forgetting bar $ rm bar Unamending in middle of a stack $ hg glog @ 19:7f79409af972 Added things to a and b | o 12:ec338db45d51 Added h | o 6:87d6d6676308 Added g | o 5:825660c69f0c Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a $ hg up 5 2 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo bar >> f $ hg amend 3 new orphan changesets $ hg rebase -s 6 -d . -q $ hg glog o 23:03ddd6fc5af1 Added things to a and b | o 22:3e7b64ee157b Added h | o 21:49635b68477e Added g | @ 20:93f0e8ffab32 Added f | o 4:aa98ab95a928 Added e | o 3:62615734edd5 Added d | o 2:28ad74487de9 Added c | o 1:29becc82797a Added b | o 0:18d04c59bb5d Added a $ hg --config experimental.evolution=createmarkers unamend abort: cannot unamend changeset with children [255] $ hg unamend 3 new orphan changesets Trying to unamend a public changeset $ hg up -C 23 5 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg phase -r . -p 1 new phase-divergent changesets $ hg unamend abort: cannot unamend public changesets (see 'hg help phases' for details) [255] Testing whether unamend retains copies or not $ hg status $ hg mv a foo $ hg ci -m "Moved a to foo" $ hg exp --git # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID cfef290346fbee5126313d7e1aab51d877679b09 # Parent 03ddd6fc5af19e028c44a2fd6d790dd22712f231 Moved a to foo diff --git a/a b/foo rename from a rename to foo $ hg mv b foobar $ hg diff --git diff --git a/b b/foobar rename from b rename to foobar $ hg amend $ hg exp --git # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID eca050985275bb271ce3092b54e56ea5c85d29a3 # Parent 03ddd6fc5af19e028c44a2fd6d790dd22712f231 Moved a to foo diff --git a/a b/foo rename from a rename to foo diff --git a/b b/foobar rename from b rename to foobar $ hg mv c wat $ hg unamend $ hg verify -v repository uses revlog format 1 checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 28 changesets with 16 changes to 11 files Retained copies in new prdecessor commit $ hg exp --git # HG changeset patch # User test # Date 0 0 # Thu Jan 01 00:00:00 1970 +0000 # Node ID 552e3af4f01f620f88ca27be1f898316235b736a # Parent 03ddd6fc5af19e028c44a2fd6d790dd22712f231 Moved a to foo diff --git a/a b/foo rename from a rename to foo Retained copies in working directoy $ hg diff --git diff --git a/b b/foobar rename from b rename to foobar diff --git a/c b/wat rename from c rename to wat $ hg revert -qa $ rm foobar wat Rename a->b, then amend b->c. After unamend, should look like b->c. $ hg co -q 0 $ hg mv a b $ hg ci -qm 'move to a b' $ hg mv b c $ hg amend $ hg unamend $ hg st --copies --change . A b a R a $ hg st --copies A c b R b $ hg revert -qa $ rm c Rename a->b, then amend b->c, and working copy change c->d. After unamend, should look like b->d $ hg co -q 0 $ hg mv a b $ hg ci -qm 'move to a b' $ hg mv b c $ hg amend $ hg mv c d $ hg unamend $ hg st --copies --change . A b a R a $ hg st --copies A d b R b