revlog: generate trivial deltas against null revision To avoid extra memory usage and performance issues with large files, generate a trivial delta header for deltas against the null revision rather than calling the usual delta generator. We append the delta header to meta rather than prepending it to data to avoid a large allocate and copy.

Welcome to Mercurial for Windows!
---------------------------------

For configuration and usage directions, please read the ReadMe.html
file that comes with this package.

Also check the release notes at:

 http://www.selenic.com/mercurial/wiki/index.cgi/WhatsNew