view tests/test-convert-bzr-114.t @ 27784:432242f41d9f

obsolete: make _computeobsoleteset much faster

This patch makes _computeobsoleteset much faster by looping
over the draft and secrets as opposed to looping over the
successors.
This works because "number of draft and secret" is typically
way smaller(<100) than the number of successor in the repo (~90k in
my checkout of core mercurial as of today). And also because
it is very fast to compute "not public()".

I timed the code with the following setup:
"""
from mercurial import hg, ui, obsolete
ui = ui.ui()
repo = hg.repository(ui, "~/hg")
l = repo.obsstore.successors # This caches the result
"""

With about 90k successors.

k=obsolete._computeobsoleteset(repo) before this patch:
10 loops, best of 3: 33.9 ms per loop

k=obsolete._computeobsoleteset(repo) after this patch:
10000 loops, best of 3: 83.3 µs per loop

#require bzr bzr114

  $ . "$TESTDIR/bzr-definitions"

The file/directory replacement can only be reproduced on
bzr >= 1.4. Merge it back in test-convert-bzr-directories once
this version becomes mainstream.
replace file with dir

  $ mkdir test-replace-file-with-dir
  $ cd test-replace-file-with-dir
  $ bzr init -q source
  $ cd source
  $ echo d > d
  $ bzr add -q d
  $ bzr commit -q -m 'add d file'
  $ rm d
  $ mkdir d
  $ bzr add -q d
  $ bzr commit -q -m 'replace with d dir'
  $ echo a > d/a
  $ bzr add -q d/a
  $ bzr commit -q -m 'add d/a'
  $ cd ..
  $ hg convert source source-hg
  initializing destination source-hg repository
  scanning source...
  sorting...
  converting...
  2 add d file
  1 replace with d dir
  0 add d/a
  $ manifest source-hg tip
  % manifest of tip
  644   d/a
  $ cd source-hg
  $ hg update
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../..