replicate directory structre with 100k files to tens of windows machines

replicate directory structre with 100k files to tens of windows machines

I have a directory structure with thousands of directories and around 100k
files. (Actually it is a large java project's source tree). I have to
replicate this to 10-20 windows machines.
What I do today is one of the options in Options for continuous one-way
replication of tens of millions of files on Windows Server? -- rsync.
I share the source directory on the master. This is mapped on all
destinations machines. Then use rsync ( from a cygwin installation ) I to
copy files over. The copying took 30 minutes. The process slows down as
number of salves increases. I hope there is some better solution. What is
it?