tests/test-profile.t

dirstate: prevent useless util.fspath() invocation for '.'

at first of dirstate.walk() on case insensitive filesystem,
normalization of '.' causes util.fspath() invocation, but '.' is not
cached in it.

this invocation is not only useless, but also harmful: initial "hg
tag" causes creation of ".hgtags" file after dirstate.walk(), and
looking up ".hgtags" in cache will fail, because directory contents of
root is already cached at util.fspath() invocation for '.'.

test --time

  $ hg --time help -q help 2>&1 | grep Time > /dev/null
  $ hg init a
  $ cd a

test --profile

  $ if "$TESTDIR/hghave" -q lsprof; then
  >     hg --profile st 2>../out || echo --profile failed
  >     grep CallCount < ../out > /dev/null || echo wrong --profile
  > 
  >     hg --profile --config profiling.output=../out st 2>&1 \
  >         || echo --profile + output to file failed
  >     grep CallCount < ../out > /dev/null \
  >         || echo wrong --profile output when saving to a file
  > 
  >     hg --profile --config profiling.format=text st 2>&1 \
  >         | grep CallCount > /dev/null || echo --profile format=text failed
  > 
  >     echo "[profiling]" >> $HGRCPATH
  >     echo "format=kcachegrind" >> $HGRCPATH
  > 
  >     hg --profile st 2>../out || echo --profile format=kcachegrind failed
  >     grep 'events: Ticks' < ../out > /dev/null || echo --profile output is wrong
  > 
  >     hg --profile --config profiling.output=../out st 2>&1 \
  >         || echo --profile format=kcachegrind + output to file failed
  >     grep 'events: Ticks' < ../out > /dev/null \
  >         || echo --profile output is wrong
  > fi