dired-omit-localp

dired-omit-localp is a variable defined in `dired-x.el'.
Its value is

no-dir

Documentation:
The LOCALP argument `dired-omit-expunge' passes to `dired-get-filename'.
If it is `no-dir', omitting is much faster, but you can only match
against the non-directory part of the file name. Set it to nil if you
need to match the entire file name.