D7071: copies: use unchecked parentrevs function to access parent

[marmoute (Pierre-Yves David)]

marmoute created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  Since we are traveling the graph down from one head, we know we will not
  encounter any filtered revisions.
  
  Using the "unchecked" version is significantly faster.
  
  revision: large amount; added files: large amount; rename small amount; c3b14617fbd7 9ba6ab77fd29
  filelog: ! wall 3.679613 comb 3.680000 user 3.580000 sys 0.100000 (median of 3)
  base:    ! wall 8.884369 comb 8.880000 user 8.850000 sys 0.030000 (median of 3)
  before:  ! wall 4.697917 comb 4.690000 user 4.660000 sys 0.030000 (median of 3)
  after:   ! wall 4.681985 comb 4.680000 user 4.640000 sys 0.040000 (median of 3)
  revision: large amount; added files: small amount; rename small amount; c3b14617fbd7 f650a9b140d2
  filelog: ! wall 0.003357 comb 0.010000 user 0.010000 sys 0.000000 (median of 781)
  base:    ! wall 12.398524 comb 12.400000 user 12.330000 sys 0.070000 (median of 3)
  before:  ! wall 6.750832 comb 6.750000 user 6.640000 sys 0.110000 (median of 3)
  after:   ! wall 6.459592 comb 6.470000 user 6.390000 sys 0.080000 (median of 3)
  revision: large amount; added files: large amount; rename large amount; 08ea3258278e d9fa043f30c0
  filelog: ! wall 2.754687 comb 2.760000 user 2.650000 sys 0.110000 (median of 4)
  base:    ! wall 1.423166 comb 1.420000 user 1.400000 sys 0.020000 (median of 8)
  before:  ! wall 1.045916 comb 1.050000 user 1.040000 sys 0.010000 (median of 10)
  after:   ! wall 0.961048 comb 0.960000 user 0.940000 sys 0.020000 (median of 11)
  revision: small amount; added files: large amount; rename large amount; df6f7a526b60 a83dc6a2d56f
  filelog: ! wall 1.552293 comb 1.550000 user 1.510000 sys 0.040000 (median of 6
  base:    ! wall 0.022662 comb 0.020000 user 0.020000 sys 0.000000 (median of 128)
  before:  ! wall 0.021577 comb 0.020000 user 0.020000 sys 0.000000 (median of 138)
  after:   ! wall 0.021649 comb 0.020000 user 0.020000 sys 0.000000 (median of 135)
  revision: small amount; added files: large amount; rename small amount; 4aa4e1f8e19a 169138063d63
  filelog: ! wall 1.500983 comb 1.500000 user 1.420000 sys 0.080000 (median of 7)
  base:    ! wall 0.006956 comb 0.010000 user 0.010000 sys 0.000000 (median of 392)
  before:  ! wall 0.004329 comb 0.000000 user 0.000000 sys 0.000000 (median of 682)
  after:   ! wall 0.004022 comb 0.000000 user 0.000000 sys 0.000000 (median of 735)
  revision: small amount; added files: small amount; rename small amount; 4bc173b045a6 964879152e2e
  filelog: ! wall 0.011745 comb 0.020000 user 0.020000 sys 0.000000 (median of 250)
  base:    ! wall 0.000156 comb 0.000000 user 0.000000 sys 0.000000 (median of 17180)
  before:  ! wall 0.000105 comb 0.000000 user 0.000000 sys 0.000000 (median of 25689)
  after:   ! wall 0.000118 comb 0.000000 user 0.000000 sys 0.000000 (median of 19170)
  revision: medium amount; added files: large amount; rename medium amount; c95f1ced15f2 2c68e87c3efe
  filelog: ! wall 3.228230 comb 3.230000 user 3.110000 sys 0.120000 (median of 4)
  base:    ! wall 0.997640 comb 1.000000 user 0.980000 sys 0.020000 (median of 10)
  before:  ! wall 0.706594 comb 0.710000 user 0.710000 sys 0.000000 (median of 15)
  after:   ! wall 0.679500 comb 0.680000 user 0.680000 sys 0.000000 (median of 15)
  revision: medium amount; added files: medium amount; rename small amount; d343da0c55a8 d7746d32bf9d
  filelog: ! wall 1.052501 comb 1.060000 user 1.040000 sys 0.020000 (median of 10
  base:    ! wall 0.214519 comb 0.220000 user 0.220000 sys 0.000000 (median of 45)
  before:  ! wall 0.163736 comb 0.160000 user 0.160000 sys 0.000000 (median of 60)
  after:   ! wall 0.149675 comb 0.150000 user 0.150000 sys 0.000000 (median of 66)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D7071

AFFECTED FILES
  mercurial/copies.py

CHANGE DETAILS

diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -274,9 +274,10 @@
     * removed: a list of removed files
     """
     cl = repo.changelog
+    parents = cl._uncheckedparentrevs
 
     def revinfo(rev):
-        p1, p2 = cl.parentrevs(rev)
+        p1, p2 = parents(rev)
         ctx = repo[rev]
         p1copies, p2copies = ctx._copies
         removed = ctx.filesremoved()
@@ -292,11 +293,12 @@
     repo = a.repo()
     children = {}
     revinfo = _revinfogetter(repo)
+    parents = repo.changelog._uncheckedparentrevs
 
     cl = repo.changelog
     missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()])
     for r in missingrevs:
-        for p in cl.parentrevs(r):
+        for p in parents(r):
             if p == node.nullrev:
                 continue
             if p not in children:



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