LaTeXDaemon speeds-up compilation of LaTeX documents by pre-processing their preamble in the background. It runs as a daemon which kicks in every time your document or one of its constituting files (auxiliary .tex files, included graphics, ...) is modified. It uses very little CPU and memory resources and only triggers a LaTeX recompilation when necessary: preamble compilation only occurs if the preamble part of the .tex document has changed.