# Reading from $FZF_DEFAULT_COMMAND; --walker is ignored
export FZF_DEFAULT_COMMAND='seq 100'
fzf --walker=dir
```
- The shell extensions (key bindings and fuzzy completion) have been updated to use the built-in walker with these new options and they are now much faster out of the box.
0.47.0
------
- Replaced ["the default find command"][find] with a built-in directory traversal to simplify the code and to achieve better performance and consistent behavior across platforms.
- Replaced ["the default find command"][find] with a built-in directory walker to simplify the code and to achieve better performance and consistent behavior across platforms.
This doesn't affect you if you have `$FZF_DEFAULT_COMMAND` set.
- Breaking changes:
- Unlike [the previous "find" command][find], the new traversal code will list hidden files, but hidden directories will still be ignored
- No filtering of `devtmpfs` or `proc` types
- Traversal is parallelized, so the order of the entries will be different each time
- You would wonder why fzf implements directory traversal anyway when it's a filter program following the Unix philosophy.
But fzf has had [the traversal code for years][walker] to tackle the performance problem on Windows. And I decided to use the same approach on different platforms as well for the benefits listed above.
- Built-in traversal is now done using the excellent [charlievieth/fastwalk][fastwalk] library, which easily outperforms its competitors and supports safely following symlinks.
- You may wonder why fzf implements directory walker anyway when it's a filter program following the [Unix philosophy][unix].
But fzf has had [the walker code for years][walker] to tackle the performance problem on Windows. And I decided to use the same approach on different platforms as well for the benefits listed above.
- Built-in walker is using the excellent [charlievieth/fastwalk][fastwalk] library, which easily outperforms its competitors and supports safely following symlinks.
- Added `$FZF_DEFAULT_OPTS_FILE` to allow managing default options in a file
- See [#3618](https://github.com/junegunn/fzf/pull/3618)