Mercurial > hg
view tests/test-rename-merge1.t @ 42044:bb271ec2fbfb
compression: introduce a `storage.revlog.zstd.level` configuration
This option control the zstd compression level used when compressing revlog
chunk. The usage of zstd for revlog compression has not graduated from
experimental yet, but we intend to fix that soon.
The option name for the compression level is more straight forward to pick, so
this changesets comes first. Having a dedicated option for each compression
engine is useful because they don't support the same range of values.
I ran the same measurement as for the zlib compression level (in the parent
changesets). The variation in repository size is stay mostly in the same (small)
range. The "read/write" performance see smallish variation, but are overall much
better than zlib. Write performance show the same tend of having better write
performance for when reaching high-end compression.
Again, we don't intend to change the default zstd compression level (currently:
3) in this series. However this is worth investigating in the future.
The Performance comparison of zlib vs zstd is quite impressive. The repository
size stay in the same range, but the performance are much better in all
situations.
Comparison summary
==================
We are looking at:
- performance range for zlib
- performance range for zstd
- comparison of default zstd (level-3) to default zlib (level 6)
- comparison of the slowest zstd time to the fastest zlib time
Read performance:
-----------------
| zlib | zstd | cmp | f2s
mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88%
pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63%
netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73%
mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71%
Write performance:
------------------
| zlib | zstd | cmp | f2s
mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86%
pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65%
netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82%
mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80%
Raw data
--------
repo alg lvl .hg/store size 00manifest.d read write
mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304
mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320
mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612
mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025
mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142
mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875
mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489
mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286
mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407
mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460
pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984
pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158
pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918
pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409
pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509
pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219
pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239
pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332
pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827
pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218
netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316
netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400
netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064
netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311
netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087
netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626
netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602
netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652
netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349
netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655
mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721
mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093
mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002
mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751
mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805
mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906
mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202
mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683
mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389
mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 27 Mar 2019 18:35:59 +0100 |
parents | d4e62df1c73d |
children | 3a7efcbdf288 |
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$ hg init $ echo "[merge]" >> .hg/hgrc $ echo "followcopies = 1" >> .hg/hgrc $ echo foo > a $ echo foo > a2 $ hg add a a2 $ hg ci -m "start" $ hg mv a b $ hg mv a2 b2 $ hg ci -m "rename" $ hg co 0 2 files updated, 0 files merged, 2 files removed, 0 files unresolved $ echo blahblah > a $ echo blahblah > a2 $ hg mv a2 c2 $ hg ci -m "modify" created new head $ hg merge -y --debug searching for copies back to rev 1 unmatched files in local: c2 unmatched files in other: b b2 all copies found (* = to merge, ! = divergent, % = renamed and deleted): src: 'a' -> dst: 'b' * src: 'a2' -> dst: 'b2' ! src: 'a2' -> dst: 'c2' ! checking for directory renames resolving manifests branchmerge: True, force: False, partial: False ancestor: af1939970a1c, local: 044f8520aeeb+, remote: 85c198ef2f6c note: possible conflict - a2 was renamed multiple times to: c2 b2 preserving a for resolve of b removing a b2: remote created -> g getting b2 b: remote moved from a -> m (premerge) picked tool ':merge' for b (binary False symlink False changedelete False) merging a and b to b my b@044f8520aeeb+ other b@85c198ef2f6c ancestor a@af1939970a1c premerge successful 1 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status -AC M b a M b2 R a C c2 $ cat b blahblah $ hg ci -m "merge" $ hg debugindex b rev linkrev nodeid p1 p2 0 1 57eacc201a7f 000000000000 000000000000 1 3 4727ba907962 000000000000 57eacc201a7f $ hg debugrename b b renamed from a:dd03b83622e78778b403775d0d074b9ac7387a66 This used to trigger a "divergent renames" warning, despite no renames $ hg cp b b3 $ hg cp b b4 $ hg ci -A -m 'copy b twice' $ hg up eb92d88a9712 0 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg up 2 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg rm b3 b4 $ hg ci -m 'clean up a bit of our mess' We'd rather not warn on divergent renames done in the same changeset (issue2113) $ hg cp b b3 $ hg mv b b4 $ hg ci -A -m 'divergent renames in same changeset' $ hg up c761c6948de0 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg up 2 files updated, 0 files merged, 1 files removed, 0 files unresolved Check for issue2642 $ hg init t $ cd t $ echo c0 > f1 $ hg ci -Aqm0 $ hg up null -q $ echo c1 > f1 # backport $ hg ci -Aqm1 $ hg mv f1 f2 $ hg ci -qm2 $ hg up 0 -q $ hg merge 1 -q --tool internal:local $ hg ci -qm3 $ hg merge 2 merging f1 and f2 to f2 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f2 c0 $ cd .. Check for issue2089 $ hg init repo2089 $ cd repo2089 $ echo c0 > f1 $ hg ci -Aqm0 $ hg up null -q $ echo c1 > f1 $ hg ci -Aqm1 $ hg up 0 -q $ hg merge 1 -q --tool internal:local $ echo c2 > f1 $ hg ci -qm2 $ hg up 1 -q $ hg mv f1 f2 $ hg ci -Aqm3 $ hg up 2 -q $ hg merge 3 merging f1 and f2 to f2 0 files updated, 1 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ cat f2 c2 $ cd .. Check for issue3074 $ hg init repo3074 $ cd repo3074 $ echo foo > file $ hg add file $ hg commit -m "added file" $ hg mv file newfile $ hg commit -m "renamed file" $ hg update 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg rm file $ hg commit -m "deleted file" created new head $ hg merge --debug searching for copies back to rev 1 unmatched files in other: newfile all copies found (* = to merge, ! = divergent, % = renamed and deleted): src: 'file' -> dst: 'newfile' % checking for directory renames resolving manifests branchmerge: True, force: False, partial: False ancestor: 19d7f95df299, local: 0084274f6b67+, remote: 5d32493049f0 note: possible conflict - file was deleted and renamed to: newfile newfile: remote created -> g getting newfile 1 files updated, 0 files merged, 0 files removed, 0 files unresolved (branch merge, don't forget to commit) $ hg status M newfile $ cd ..