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    46bb41778e4d
    copies-rust: use immutable "OrdMap" to store copies information · 46bb41778e4d
    Pierre-Yves David authored
    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
    
    Differential Revision: https://phab.mercurial-scm.org/D9300
    46bb41778e4d
    History
    copies-rust: use immutable "OrdMap" to store copies information
    Pierre-Yves David authored
    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
    
    Differential Revision: https://phab.mercurial-scm.org/D9300