Inspired by a blog posting on Improving build times of large Qt apps found through Planet KDE, I tried to apply the concept of unity builds to KBibTeX. The idea with a unity build is instead of compiling a set of source code files individually into objects before linking them to merge them into one big source file and only compile this file. This approach promises time and I/O savings for C++, as repetitive reads on included headers can be skipped. Some issues such as name clashes can occur in unity builds, though.