tests/test-simplemerge.py.out

store: optimize fncache._load a bit by dirdecoding the contents in one go

For a netbeans clone on Windows 7 x64:

  Before:
    $ hg perffncacheload
    ! wall 0.124000 comb 0.124801 user 0.124801 sys 0.000000 (best of 76)

  After:
    $ hg perffncacheload
    ! wall 0.096000 comb 0.093601 user 0.078001 sys 0.015600 (best of 97)

....................
----------------------------------------------------------------------
Ran 20 tests in 0.000s

OK