Bryan Drewery (bdrewery) has been working to improve the build framework as well as buildworld build times. The build system has largely been unchanged for large-scale changes for many years. Most of the effort has been improving the recent META_MODE merge that was presented at BSDCan 2014. This is a new build system that is not currently enabled by default but brings many benefits. Beyond that some highlights of work done in buildworld are: - WITH_FAST_DEPEND which avoids calling 'mkdep' during the 'make depend' phase and instead generates dependency files during compilation. This was pre-processing all source files twice. This saves 16-35% in build times. - WITH_CCACHE_BUILD adds built-in ccache support which avoids many of the historical pitfalls of changing CC in make.conf to achieve it. - Many improvements for parallelization of the build. - LIBADD improvements to ensure proper usage. Work undergoing to reduce overlinking. - A lot of cleanup of improper framework usage. - Ensuring files installed from the build fail if the destination directory is missing, rather than install a file as the directory name.