view tests/test-changelog-exec.t @ 23031:3c0983cc279e

i18n: cache the result of every gettext call

In looking at profiler output for 'hg log' on mozilla-central, I
noticed we spent a _huge_ amount of time in gettext relative to what
it's doing. Caching provides a roughly 15% performance improvement
even on repositories as small as hg.

== hg repo on linux ==

Before:
  %   cumulative      self
 time    seconds   seconds  name
  5.05      0.19      0.19  i18n.py:62:gettext
  4.84      0.18      0.18  revlog.py:88:decompress
  2.95      0.17      0.11  changelog.py:201:node
  2.32      0.09      0.09  ui.py:577:write
  2.11      0.08      0.08  i18n.py:72:gettext
  2.11      0.08      0.08  obsolete.py:196:_fm0readmarkers
  1.89      0.07      0.07  obsolete.py:569:_load
  1.68      0.63      0.06  localrepo.py:29:__get__

real	0m4.026s
user	0m3.993s
sys	0m0.034s

After:
  %   cumulative      self
 time    seconds   seconds  name
  8.05      0.26      0.26  revlog.py:88:decompress
  2.68      0.22      0.09  color.py:395:write
  2.20      0.07      0.07  obsolete.py:196:_fm0readmarkers
  1.95      0.06      0.06  obsolete.py:174:_fm0readmarkers
  1.95      0.06      0.06  ui.py:577:write
  1.95      0.06      0.06  util.py:1228:datestr
  1.71      0.06      0.06  utf_8.py:16:decode
  1.71      0.06      0.06  revlog.py:273:__len__

real	0m3.519s
user	0m3.447s
sys	0m0.073s


== mozilla-central repo on linux ==
Before:
  %   cumulative      self
 time    seconds   seconds  name
  7.72      2.35      2.35  revlog.py:88:decompress
  4.46      1.36      1.36  i18n.py:62:gettext
  2.22      0.67      0.67  i18n.py:72:gettext
  2.19      1.14      0.67  changelog.py:201:node
  2.16      0.66      0.66  ui.py:577:write
  1.96      0.60      0.60  utf_8.py:16:decode
  1.93      1.97      0.59  color.py:395:write
  1.85      0.81      0.56  changelog.py:136:tip

real	0m30.822s
user	0m30.660s
sys	0m0.149s

After:
  %   cumulative      self
 time    seconds   seconds  name
  9.82      2.49      2.49  revlog.py:88:decompress
  2.67      1.31      0.68  localrepo.py:29:__get__
  2.57      0.65      0.65  utf_8.py:16:decode
  2.48      1.01      0.63  changelog.py:201:node
  2.10      0.82      0.53  changelog.py:136:tip
  2.01      0.51      0.51  ui.py:577:write
  1.91      0.49      0.49  util.py:1232:datestr
  1.85      1.65      0.47  color.py:395:write

real	0m25.619s
user	0m25.446s
sys	0m0.166s

== cpython repo on os x =
Before:
  %   cumulative      self
 time    seconds   seconds  name
  5.05      1.35      1.35  cmdutil.py:982:_show
  4.59      1.22      1.22  revlog.py:274:__len__
  3.98      1.06      1.06  i18n.py:62:gettext
  3.91      1.04      1.04  revlog.py:1016:revision
  3.68      0.98      0.98  revlog.py:337:parents
  3.45      0.92      0.92  revlog.py:88:decompress
  2.91      0.78      0.78  revlog.py:309:rev
  2.62      0.70      0.70  revlog.py:1033:revision

real	0m30.414s
user	0m28.145s
sys	0m0.541s



After:
  %   cumulative      self
 time    seconds   seconds  name
  7.98      1.66      1.66  cmdutil.py:982:_show
  6.83      1.42      1.42  changelog.py:46:decodeextra
  5.18      1.08      1.08  revlog.py:274:__len__
  3.94      0.82      0.82  revlog.py:1016:revision
  3.41      0.71      0.71  revlog.py:309:rev
  3.32      0.69      0.69  revlog.py:88:decompress
  2.99      0.63      0.62  revlog.py:1033:revision
  2.69      0.56      0.56  revlog.py:341:start

real	0m22.811s
user	0m21.883s
sys	0m0.397s

#require execbit

b51a8138292a introduced a regression where we would mention in the
changelog executable files added by the second parent of a merge. Test
that that doesn't happen anymore

  $ hg init repo
  $ cd repo
  $ echo foo > foo
  $ hg ci -qAm 'add foo'

  $ echo bar > bar
  $ chmod +x bar
  $ hg ci -qAm 'add bar'

manifest of p2:

  $ hg manifest
  bar
  foo

  $ hg up -qC 0
  $ echo >> foo
  $ hg ci -m 'change foo'
  created new head

manifest of p1:

  $ hg manifest
  foo

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ chmod +x foo
  $ hg ci -m 'merge'

this should not mention bar but should mention foo:

  $ hg tip -v
  changeset:   3:c53d17ff3380
  tag:         tip
  parent:      2:ed1b79f46b9a
  parent:      1:d394a8db219b
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  files:       foo
  description:
  merge
  
  

  $ hg debugindex bar
     rev    offset  length  ..... linkrev nodeid       p1           p2 (re)
       0         0       5  .....       1 b004912a8510 000000000000 000000000000 (re)

  $ cd ..