dirstate-tree: Skip readdir() in `hg status -mard`
When running the status algorithm in a mode where we don’t list unknown
or ignored files, all we care about are files that are listed in the dirstate.
We can there for skip making expensive calls to readdir() to list the contents
of filesystem directories, and instead only run stat() to get the filesystem
state of files listed in the dirstate. (This state may be an error for files
that don’t exist anymore on the filesystem.)
On 16 CPU threads, this reduces the time spent in the `status()` function for
`hg status -mard` on an old snapshot of mozilla-central from ~70ms to ~50ms.
Differential Revision: https://phab.mercurial-scm.org/D10752
$ cat << EOF >> $HGRCPATH
> [extensions]
> rebase=
> EOF
==================================
Test backup-bundle config option |
==================================
Test with Pre-obsmarker rebase:
1) When config option is not set:
$ hg init repo1
$ cd repo1
$ echo a>a
$ hg ci -qAma
$ echo b>b
$ hg ci -qAmb
$ echo c>c
$ hg ci -qAmc
$ hg up 0 -q
$ echo d>d
$ hg ci -qAmd
$ echo e>e
$ hg ci -qAme
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 4: e
|
o 3: d
|
| o 2: c
| |
| o 1: b
|/
o 0: a
$ hg rebase -s 1 -d .
rebasing 1:d2ae7f538514 "b"
rebasing 2:177f92b77385 "c"
saved backup bundle to $TESTTMP/repo1/.hg/strip-backup/d2ae7f538514-c7ed7a78-rebase.hg
$ hg log -GT "{rev}: {firstline(desc)}\n"
o 4: c
|
o 3: b
|
@ 2: e
|
o 1: d
|
o 0: a
2) When config option is set:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = False
> EOF
$ echo f>f
$ hg ci -Aqmf
$ echo g>g
$ hg ci -Aqmg
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 6: g
|
o 5: f
|
| o 4: c
| |
| o 3: b
|/
o 2: e
|
o 1: d
|
o 0: a
$ hg rebase -s 3 -d .
rebasing 3:05bff2a95b12 "b"
rebasing 4:1762bde4404d "c"
$ hg log -GT "{rev}: {firstline(desc)}\n"
o 6: c
|
o 5: b
|
@ 4: g
|
o 3: f
|
o 2: e
|
o 1: d
|
o 0: a
Test when rebased revisions are stripped during abort:
======================================================
$ echo conflict > c
$ hg ci -Am "conflict with c"
adding c
created new head
$ hg log -GT "{rev}: {firstline(desc)}\n"
@ 7: conflict with c
|
| o 6: c
| |
| o 5: b
|/
o 4: g
|
o 3: f
|
o 2: e
|
o 1: d
|
o 0: a
When backup-bundle = True:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = True
> EOF
$ hg rebase -s 5 -d .
rebasing 5:1f8148a544ee "b"
rebasing 6:f8bc7d28e573 "c"
merging c
warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
[240]
$ hg rebase --abort
saved backup bundle to $TESTTMP/repo1/.hg/strip-backup/818c1a43c916-2b644d96-backup.hg
rebase aborted
When backup-bundle = False:
$ cat << EOF >> $HGRCPATH
> [rewrite]
> backup-bundle = False
> EOF
$ hg rebase -s 5 -d .
rebasing 5:1f8148a544ee "b"
rebasing 6:f8bc7d28e573 "c"
merging c
warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
[240]
$ hg rebase --abort
rebase aborted
$ cd ..