Re: [PATCH v1 0/2] fsexcludes: Add programmatic way to exclude files

> In git repos with large working directories an external file system monitor
> (like fsmonitor or gvfs) can track what files in the working directory have been
> modified.  This information can be used to speed up git operations that scale
> based on the size of the working directory so that they become O(# of modified
> files) vs O(# of files in the working directory).
>
> The fsmonitor patch series added logic to limit what files git had to stat() to
> the set of modified files provided by the fsmonitor hook proc.  It also used the
> untracked cache (if enabled) to limit the files/folders git had to scan looking
> for new/untracked files.  GVFS is another external file system model that also
> speeds up git working directory based operations that has been using a different
> mechanism (programmatically generating an excludes file) to enable git to be
> O(# of modified files).
>
> This patch series will introduce a new way to limit git�s traversal of the
> working directory that does not require the untracked cache (fsmonitor) or using
> the excludes feature (GVFS).  It does this by enhancing the existing excludes
> logic in dir.c to support a new �File System Excludes� or fsexcludes API that is
> better tuned to these programmatic applications.