view tests/test-sparse-clone.t @ 49522:52464a20add0

rhg: parallellize computation of [unsure_is_modified]

[unsure_is_modified] is called for every file for which we can't
determine its status based on its size and mtime alone.

In particular, this happens if the mtime of the file changes
without its contents changing.

Parallellizing this improves performance significantly when
we have many of these files.

Here's an example run (on a repo with ~400k files after dropping FS caches)

```
before:
real	0m53.901s
user	0m27.806s
sys	0m31.325s

after:
real	0m32.017s
user	0m34.277s
sys	1m26.250s
```

Another example run (a different FS):

```
before:
real	3m28.479s
user	0m31.800s
sys	0m25.324s

after:
real	0m29.751s
user	0m41.814s
sys	1m15.387s
```

test sparse

  $ cat >> $HGRCPATH << EOF
  > [ui]
  > username = nobody <[e-mail]>
  > [extensions]
  > sparse=
  > purge=
  > strip=
  > rebase=
  > EOF

  $ hg init myrepo
  $ cd myrepo
  $ echo a > index.html
  $ echo x > data.py
  $ echo z > readme.txt
  $ cat > webpage.sparse <<EOF
  > [include]
  > *.html
  > EOF
  $ cat > backend.sparse <<EOF
  > [include]
  > *.py
  > EOF
  $ hg ci -Aqm 'initial'
  $ cd ..

Verify local clone with a sparse profile works

  $ hg clone --enable-profile webpage.sparse myrepo clone1
  updating to branch default
  warning: sparse profile 'webpage.sparse' not found in rev 000000000000 - ignoring it
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd clone1
  $ ls -A
  .hg
  index.html
  $ cd ..

Verify local clone with include works

  $ hg clone --include *.sparse myrepo clone2
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd clone2
  $ ls -A
  .hg
  backend.sparse
  webpage.sparse
  $ cd ..

Verify local clone with exclude works

  $ hg clone --exclude data.py myrepo clone3
  updating to branch default
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd clone3
  $ ls -A
  .hg
  backend.sparse
  index.html
  readme.txt
  webpage.sparse
  $ cd ..

Verify sparse clone profile over ssh works

  $ hg clone -q --enable-profile webpage.sparse ssh://user@dummy/myrepo clone4
  warning: sparse profile 'webpage.sparse' not found in rev 000000000000 - ignoring it
  $ cd clone4
  $ ls -A
  .hg
  index.html
  $ cd ..