We are building a Flex 4.5 application using the pure MVC framework. We use the Apache Subversion SVN server for source code control (and ant for building). When we do a build of the project the build time can vary between 30 seconds and 15 minutes! Can anyone cast any light on why this might be, as you can imagine it is having quite a negative impact on our productivity! There does not seem to be any pattern to this and is common to all the machines on our network. Any help would be hugely appreciated!