stream-clone: disable gc for the entry listing section for the v2 format
This is similar to the change we did for the v3 format in 6e4c8366c5ce.
The benchmark bellow show this gives us a notable gains, especially on larger
repositories.
### benchmark.name = hg.perf.stream-locked-section
# benchmark.name = hg.perf.stream-locked-section
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.version = v2
## data-env-vars.name = pypy-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 0.503820 ~~~~~
1106d1bf695e: 0.470078 (-6.70%, -0.03)
## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 0.535756 ~~~~~
1106d1bf695e: 0.490249 (-8.49%, -0.05)
## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog
5e931bf8707c: 1.327041 ~~~~~
1106d1bf695e: 1.174636 (-11.48%, -0.15)
## data-env-vars.name = netbeans-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 2.439158 ~~~~~
1106d1bf695e: 2.220515 (-8.96%, -0.22)
## data-env-vars.name = netbeans-2019-11-07-zstd-sparse-revlog
5e931bf8707c: 2.630794 ~~~~~
1106d1bf695e: 2.261473 (-14.04%, -0.37)
## data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 5.769002 ~~~~~
1106d1bf695e: 5.062000 (-12.26%, -0.71)
## data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
5e931bf8707c: 13.351750 ~~~~~
1106d1bf695e: 12.346655 (-7.53%, -1.01)
## data-env-vars.name = mozilla-central-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 10.772939 ~~~~~
1106d1bf695e: 9.495407 (-11.86%, -1.28)
## data-env-vars.name = mozilla-unified-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 10.864297 ~~~~~
1106d1bf695e: 9.475597 (-12.78%, -1.39)
## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
5e931bf8707c: 17.448335 ~~~~~
1106d1bf695e: 16.027474 (-8.14%, -1.42)
=============================================================
Check that we can compute and exchange revision rank properly
=============================================================
$ cat << EOF >> $HGRCPATH
> [format]
> exp-use-changelog-v2=enable-unstable-format-and-corrupt-my-data
> EOF
Test minimal rank computation with merge
$ hg init rank-repo-minimal
$ cd rank-repo-minimal
$ touch 0
$ hg commit -Aqm 0
$ touch 1
$ hg commit -Aqm 1
$ hg update -qr 0
$ touch 2
$ hg commit -Aqm 2
$ hg merge -qr 1
$ hg commit -m 3
$ touch 4
$ hg commit -Aqm 4
$ hg log --graph --template '{rev} {_fast_rank}\n'
@ 4 5
|
o 3 4
|\
| o 2 2
| |
o | 1 2
|/
o 0 1
$ cd ..
Build a bigger example repo
$ hg init rank-repo-generated
$ cd rank-repo-generated
$ hg debugbuilddag '.:root1+5:mp1<root1+10:mp2/mp1+3<mp1+2:mp3/mp2$+15/mp1+4'
$ hg log -G -T '{desc}'
o r42
|
o r41
|
o r40
|
o r39
|
o r38
|\
| o r37
| |
| o r36
| |
| o r35
| |
| o r34
| |
| o r33
| |
| o r32
| |
| o r31
| |
| o r30
| |
| o r29
| |
| o r28
| |
| o r27
| |
| o r26
| |
| o r25
| |
| o r24
| |
| o r23
|
| o r22
| |\
| | o r21
| | |
+---o r20
| |
| | o r19
| | |
| | o r18
| | |
| | o r17
| | |
+---o r16
| |/
| o r15
| |
| o r14
| |
| o r13
| |
| o r12
| |
| o r11
| |
| o r10
| |
| o r9
| |
| o r8
| |
| o r7
| |
| o r6
| |
o | r5
| |
o | r4
| |
o | r3
| |
o | r2
| |
o | r1
|/
o r0
Check the rank
--------------
$ hg log -G -T '{_fast_rank}'
o 26
|
o 25
|
o 24
|
o 23
|
o 22
|\
| o 15
| |
| o 14
| |
| o 13
| |
| o 12
| |
| o 11
| |
| o 10
| |
| o 9
| |
| o 8
| |
| o 7
| |
| o 6
| |
| o 5
| |
| o 4
| |
| o 3
| |
| o 2
| |
| o 1
|
| o 19
| |\
| | o 8
| | |
+---o 7
| |
| | o 20
| | |
| | o 19
| | |
| | o 18
| | |
+---o 17
| |/
| o 11
| |
| o 10
| |
| o 9
| |
| o 8
| |
| o 7
| |
| o 6
| |
| o 5
| |
| o 4
| |
| o 3
| |
| o 2
| |
o | 6
| |
o | 5
| |
o | 4
| |
o | 3
| |
o | 2
|/
o 1