diff tests/test-copies.t @ 42486:35d674a3d5db

copies: don't filter out copy targets created on other side of merge commit If file X is copied to Y on one side of merge and the other side creates Y (no copy), we would not mark that as copy. In the changeset-centric pathcopies() version, that was done by checking if the copy target existed on the other branch. Even though merge commits are pretty uncommon, it still turned out to be too expensive to load the manifest of the parents of merge commits. In a repo of mozilla-unified converted to storing copies in changesets, about 2m30s of `hg debugpathcopies FIREFOX_BETA_59_END FIREFOX_BETA_60_BASE` is spent on this check of merge commits. I tried to think of a way of storing more information in the changesets in order to cheaply detect these cases, but I couldn't think of a solution. So this patch simply removes those checks. For reference, these extra copies are reported from the aforementioned command after this patch: browser/base/content/sanitize.js -> browser/modules/Sanitizer.jsm testing/mozbase/mozprocess/tests/process_normal_finish_python.ini -> testing/mozbase/mozprocess/tests/process_normal_finish.ini testing/mozbase/mozprocess/tests/process_waittimeout_python.ini -> testing/mozbase/mozprocess/tests/process_waittimeout.ini testing/mozbase/mozprocess/tests/process_waittimeout_10s_python.ini -> testing/mozbase/mozprocess/tests/process_waittimeout_10s.ini Since these copies were created on one side of some merge, it still seems reasonable to include them, so I'm not even sure it's worse than filelog pathcopies(), just different. Differential Revision: https://phab.mercurial-scm.org/D6420
author Martin von Zweigbergk <martinvonz@google.com>
date Thu, 18 Apr 2019 21:22:14 -0700
parents 027f1567f97f
children 84aff7e20c55
line wrap: on
line diff
--- a/tests/test-copies.t	Thu Apr 18 00:40:53 2019 -0700
+++ b/tests/test-copies.t	Thu Apr 18 21:22:14 2019 -0700
@@ -452,8 +452,9 @@
   y -> z
   $ hg debugpathcopies 1 3
 
-Create x and y, then rename x to z on one side of merge, and rename y to z and modify z on the
-other side.
+Create x and y, then rename x to z on one side of merge, and rename y to z and
+modify z on the other side. When storing copies in the changeset, we don't
+filter out copies whose target was created on the other side of the merge.
   $ newrepo
   $ echo x > x
   $ echo y > y
@@ -494,12 +495,16 @@
   o  0 add x and y
      x y
   $ hg debugpathcopies 1 4
+  y -> z (no-filelog !)
   $ hg debugpathcopies 2 4
+  x -> z (no-filelog !)
   $ hg debugpathcopies 0 4
   x -> z (filelog !)
   y -> z (compatibility !)
   $ hg debugpathcopies 1 5
+  y -> z (no-filelog !)
   $ hg debugpathcopies 2 5
+  x -> z (no-filelog !)
   $ hg debugpathcopies 0 5
   x -> z