view tests/sslcerts/pub-not-yet.pem @ 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
```

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----