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Differential D9300

copies-rust: use immutable "OrdMap" to store copies information
ClosedPublic

Authored by marmoute on Nov 12 2020, 10:16 AM.

Details

Reviewers
Alphare
pulkit
Group Reviewers
hg-reviewers
Commits
rHG0d99778af68a: copies-rust: use immutable "OrdMap" to store copies information
Summary

The large majority of time is currently spent coping and merging directories.
the IM crate offer "immutable" Map, that use "copy on write" internally. The
new object use the same API as the standard HashMap. So switching to it is
trivial and it reduce copying cost significantly. More importantly, using
immutable structure will unlock new possibility for a massive speed up of the
"merging" part. This will came in a later changesets.

Performance wise, we get very significant boost in the worst case. Below is some
highlight of how we fare compared to the previous changeset.

Repo Cases Source-Rev Dest-Rev Old-Time New-Time Difference Factor

pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 62.468362 s, 33.527067 s, -28.941295 s, × 0.5367
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 3.619850 s, 0.963905 s, -2.655945 s, × 0.2663
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 11.926587 s, 4.217003 s, -7.709584 s, × 0.3536
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 10.674920 s, 1.114864 s, -9.560056 s, × 0.1044
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 19.647038 s, 1.442793 s, -18.204245 s, × 0.0734

And we sometimes catch up with the performance of the python code as highlighted
below:

Repo Cases Source-Rev Dest-Rev Py-time Rust-time Difference Factor

mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 1.074593 s, 1.442793 s, +0.368200 s, × 1.3426

However, multiple case remains significantly slower, as highlighted below

Repo Cases Source-Rev Dest-Rev Py-time Rust-time Difference Factor

mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 0.190133 s, 0.963905 s, +0.773772 s, × 5.0696
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 0.440694 s, 4.217003 s, +3.776309 s, × 9.5690
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.370675 s, 1.114864 s, +0.744189 s, × 3.0077
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 3.581556 s, 33.527067 s, +29.945511 s, × 9.3610

Below are two different tables for full performance comparison

  • this changeset against the previous one (spoiler: it is much better)
  • this changeset against the python code (spoiler: still slower, but it gets more comparable)

This changeset compared to the previous one

Repo Cases Source-Rev Dest-Rev Old-Time New-Time Difference Factor

mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000046 s, 0.000049 s, +0.000003 s, × 1.0652
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.000173 s, 0.000179 s, +0.000006 s, × 1.0347
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.006303 s, 0.006494 s, +0.000191 s, × 1.0303
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.000229 s, 0.000339 s, +0.000110 s, × 1.4803
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.000056 s, 0.000057 s, +0.000001 s, × 1.0179
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.000143 s, 0.000299 s, +0.000156 s, × 2.0909
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.001166 s, 0.001200 s, +0.000034 s, × 1.0292
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.022931 s, 0.025120 s, +0.002189 s, × 1.0955
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 0.852446 s, 0.506921 s, -0.345525 s, × 0.5947
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 2.221824 s, 1.272060 s, -0.949764 s, × 0.5725
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 1.194162 s, 0.690941 s, -0.503221 s, × 0.5786
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 62.468362 s, 33.527067 s, -28.941295 s, × 0.5367
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 0.022116 s, 0.021970 s, -0.000146 s, × 0.9934
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 2.972788 s, 1.772094 s, -1.200694 s, × 0.5961
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.000180 s, 0.000185 s, +0.000005 s, × 1.0278
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.000123 s, 0.000135 s, +0.000012 s, × 1.0976
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.000315 s, 0.000329 s, +0.000014 s, × 1.0444
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.001297 s, 0.001343 s, +0.000046 s, × 1.0355
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.024884 s, 0.029396 s, +0.004512 s, × 1.1813
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.032653 s, 0.040210 s, +0.007557 s, × 1.2314
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 4.230118 s, 4.556794 s, +0.326676 s, × 1.0772
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.000197 s, 0.000199 s, +0.000002 s, × 1.0102
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.000622 s, 0.000639 s, +0.000017 s, × 1.0273
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.000296 s, 0.000542 s, +0.000246 s, × 1.8311
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.001626 s, 0.001685 s, +0.000059 s, × 1.0363
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.006218 s, 0.006954 s, +0.000736 s, × 1.1184
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.132760 s, 0.132938 s, +0.000178 s, × 1.0013
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.029001 s, 0.008683 s, -0.020318 s, × 0.2994
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.005886 s, 0.005956 s, +0.000070 s, × 1.0119
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 3.619850 s, 0.963905 s, -2.655945 s, × 0.2663
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.058678 s, 0.049239 s, -0.009439 s, × 0.8391
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 11.926587 s, 4.217003 s, -7.709584 s, × 0.3536
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.001204 s, 0.001197 s, -0.000007 s, × 0.9942
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.001217 s, 0.001213 s, -0.000004 s, × 0.9967
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.000605 s, 0.000762 s, +0.000157 s, × 1.2595
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.001876 s, 0.001909 s, +0.000033 s, × 1.0176
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 0.078190 s, 0.093021 s, +0.014831 s, × 1.1897
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.135428 s, 0.134536 s, -0.000892 s, × 0.9934
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.029123 s, 0.009071 s, -0.020052 s, × 0.3115
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.006141 s, 0.006206 s, +0.000065 s, × 1.0106
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 4.857827 s, 1.150502 s, -3.707325 s, × 0.2368
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 10.674920 s, 1.114864 s, -9.560056 s, × 0.1044
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 9.789462 s, 1.042658 s, -8.746804 s, × 0.1065
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 1.087890 s, 0.447402 s, -0.640488 s, × 0.4113
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.060556 s, 0.051132 s, -0.009424 s, × 0.8444
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : killed , 83.508590 s
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : killed , 55.079813 s
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 19.647038 s, 1.442793 s, -18.204245 s, × 0.0734

This changeset compared to the Python Code

Repo Cases Source-Rev Dest-Rev Py-time Rust-time Difference Factor

mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000044 s, 0.000049 s, +0.000005 s, × 1.1136
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.000138 s, 0.000179 s, +0.000041 s, × 1.2971
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.005052 s, 0.006494 s, +0.001442 s, × 1.2854
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.000219 s, 0.000339 s, +0.000120 s, × 1.5479
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.000055 s, 0.000057 s, +0.000002 s, × 1.0364
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.000128 s, 0.000299 s, +0.000171 s, × 2.3359
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.001089 s, 0.001200 s, +0.000111 s, × 1.1019
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.017407 s, 0.025120 s, +0.007713 s, × 1.4431
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 0.094175 s, 0.506921 s, +0.412746 s, × 5.3828
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 0.238009 s, 1.272060 s, +1.034051 s, × 5.3446
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 0.125876 s, 0.690941 s, +0.565065 s, × 5.4891
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 3.581556 s, 33.527067 s, +29.945511 s, × 9.3610
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 0.016721 s, 0.021970 s, +0.005249 s, × 1.3139
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 0.242367 s, 1.772094 s, +1.529727 s, × 7.3116
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.000165 s, 0.000185 s, +0.000020 s, × 1.1212
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.000114 s, 0.000135 s, +0.000021 s, × 1.1842
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.000296 s, 0.000329 s, +0.000033 s, × 1.1115
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.001124 s, 0.001343 s, +0.000219 s, × 1.1948
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.013060 s, 0.029396 s, +0.016336 s, × 2.2508
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.017112 s, 0.040210 s, +0.023098 s, × 2.3498
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.660350 s, 4.556794 s, +3.896444 s, × 6.9006
netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 10.032499 s, killed
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.000189 s, 0.000199 s, +0.000010 s, × 1.0529
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.000462 s, 0.000639 s, +0.000177 s, × 1.3831
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.000270 s, 0.000542 s, +0.000272 s, × 2.0074
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.001474 s, 0.001685 s, +0.000211 s, × 1.1431
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.004806 s, 0.006954 s, +0.002148 s, × 1.4469
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.085150 s, 0.132938 s, +0.047788 s, × 1.5612
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007064 s, 0.008683 s, +0.001619 s, × 1.2292
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004741 s, 0.005956 s, +0.001215 s, × 1.2563
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 0.190133 s, 0.963905 s, +0.773772 s, × 5.0696
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.035651 s, 0.049239 s, +0.013588 s, × 1.3811
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 0.440694 s, 4.217003 s, +3.776309 s, × 9.5690
mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 18.454163 s, killed
mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 31.562719 s, killed
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.001189 s, 0.001197 s, +0.000008 s, × 1.0067
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.001204 s, 0.001213 s, +0.000009 s, × 1.0075
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.000586 s, 0.000762 s, +0.000176 s, × 1.3003
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.001845 s, 0.001909 s, +0.000064 s, × 1.0347
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 0.063822 s, 0.093021 s, +0.029199 s, × 1.4575
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.088038 s, 0.134536 s, +0.046498 s, × 1.5282
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007389 s, 0.009071 s, +0.001682 s, × 1.2276
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004868 s, 0.006206 s, +0.001338 s, × 1.2749
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 0.222450 s, 1.150502 s, +0.928052 s, × 5.1720
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.370675 s, 1.114864 s, +0.744189 s, × 3.0077
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.358020 s, 1.042658 s, +0.684638 s, × 2.9123
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 0.145235 s, 0.447402 s, +0.302167 s, × 3.0805
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.037606 s, 0.051132 s, +0.013526 s, × 1.3597
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 7.382439 s, 83.508590 s, +76.126151 s, × 11.3118
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 7.273506 s, 55.079813 s, +47.806307 s, × 7.5727
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 1.074593 s, 1.442793 s, +0.368200 s, × 1.3426
mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 27.746195 s, killed

Diff Detail

Repository
rHG Mercurial
Branch
default
Lint
No Linters Available
Unit
No Unit Test Coverage

Event Timeline

marmoute created this revision.Nov 12 2020, 10:16 AM
Alphare accepted this revision.Nov 13 2020, 6:26 AM
Alphare added a subscriber: Alphare.

This is the right niche for im-rc, nice library!

Same as for the rest of this series, the tables are hard to read without triple backticks.

marmoute updated this revision to Diff 23494.Nov 13 2020, 7:05 PM
Alphare updated this revision to Diff 23723.Nov 27 2020, 11:10 AM
pulkit accepted this revision.Nov 28 2020, 4:46 AM
This revision is now accepted and ready to land.Nov 28 2020, 4:46 AM
marmoute updated this revision to Diff 23796.Nov 28 2020, 6:02 PM

Revision Contents
Changeset List

Diff 23494

rust/Cargo.lock

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rust/hg-core/Cargo.toml

[package] [package]
name = "hg-core" name = "hg-core"
version = "0.1.0" version = "0.1.0"
authors = ["Georges Racinet <gracinet@anybox.fr>"] authors = ["Georges Racinet <gracinet@anybox.fr>"]
description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)" description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)"
edition = "2018" edition = "2018"
[lib] [lib]
name = "hg" name = "hg"
[dependencies] [dependencies]
byteorder = "1.3.4" byteorder = "1.3.4"
hex = "0.4.2" hex = "0.4.2"
im-rc = "15.0.*"
lazy_static = "1.4.0" lazy_static = "1.4.0"
memchr = "2.3.3" memchr = "2.3.3"
rand = "0.7.3" rand = "0.7.3"
rand_pcg = "0.2.1" rand_pcg = "0.2.1"
rand_distr = "0.2.2" rand_distr = "0.2.2"
rayon = "1.3.0" rayon = "1.3.0"
regex = "1.3.9" regex = "1.3.9"
twox-hash = "1.5.0" twox-hash = "1.5.0"

rust/hg-core/src/copy_tracing.rs

use crate::utils::hg_path::HgPathBuf; use crate::utils::hg_path::HgPathBuf;
use crate::Revision; use crate::Revision;
use im_rc::ordmap::OrdMap;
use std::collections::HashMap; use std::collections::HashMap;
use std::collections::HashSet; use std::collections::HashSet;
pub type PathCopies = HashMap<HgPathBuf, HgPathBuf>; pub type PathCopies = HashMap<HgPathBuf, HgPathBuf>;
#[derive(Clone, Debug)] #[derive(Clone, Debug)]
struct TimeStampedPathCopy { struct TimeStampedPathCopy {
/// revision at which the copy information was added /// revision at which the copy information was added
rev: Revision, rev: Revision,
/// the copy source /// the copy source
path: Option<HgPathBuf>, path: Option<HgPathBuf>,
} }
type TimeStampedPathCopies = HashMap<HgPathBuf, TimeStampedPathCopy>; type TimeStampedPathCopies = OrdMap<HgPathBuf, TimeStampedPathCopy>;
/// hold parent 1, parent 2 and relevant files actions. /// hold parent 1, parent 2 and relevant files actions.
pub type RevInfo = (Revision, Revision, ChangedFiles); pub type RevInfo = (Revision, Revision, ChangedFiles);
/// represent the files affected by a changesets /// represent the files affected by a changesets
/// ///
/// This hold a subset of mercurial.metadata.ChangingFiles as we do not need /// This hold a subset of mercurial.metadata.ChangingFiles as we do not need
/// all the data categories tracked by it. /// all the data categories tracked by it.