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### 1.2 Working Directories

Working directories are directories where files have most recently been opened. The current directory is inserted at the front of this `ido-work-directory-list` whenever a file is opened with `ido-find-file` and other file-related functions.

User Option: ido-max-work-directory-list

  This user option specifies maximum number of working directories to record.

User Option: ido-max-dir-file-cache

  This user option specifies maximum number of working directories to be cached. This is the size of the cache of `file-name-all-completions` results. Each cache entry is time stamped with the modification time of the directory. Some systems, like MS-Windows, have unreliable directory modification times, so you may choose to disable caching on such systems, or explicitly refresh the cache contents using the command `ido-reread-directory` (usually `C-l`) in the minibuffer.