doc/README

largefiles: optimize performance when updating (issue3440)

Previously, when updating, cachelfiles was called blindly on all largefiles
in the repository at the revision being updated to, despite the fact that
a list of which largefiles needs to be updated has already been collected.  This
optimization constrains the cachelfiles call to only the largefiles that need
to be updated.

On a repository with about 80 largefiles, updating between two revisions that
only change one largefile goes from approximately 6.7 seconds to 3.3 seconds.

Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:

  http://docutils.sourceforge.net/rst.html

It's also convertible to a variety of other formats including standard
UNIX man page format and HTML. You'll need to install Docutils:

  http://docutils.sourceforge.net/

Use the Makefile in this directory to generate the man and HTML pages.