On 23/02/2012 03:29, erolagnab wrote: 5.4 has a significantly more power which makes the build process more complex and thus slower. However we've never actually profiled the build process to attempt to improve it's performance or reduce memory. We won't get around to improving those for 5.4, but we will address it as some point in the future, I know that Mario is itching to get parallel rule building :) As always code contributions are welcome :) Mark