Perf improvements for builds

[mischah]

We should consider which tools make sense to improve performance beside automatically generate CSS Sprites (#61)

Does it make sense to use a tool to inline above-the-fold CSS by default?
See above-the-fold CSS Critical-path (Above-the-fold) CSS Tools

Should we add a tool to benchmark and analyse performance?
See http://perf-tooling.today/tools?q=metrics

Any suggestions welcome

//cc @krnlde @mfroehner @uschmidt @revrng @jMengel

[krnlde]

We should also consider @mpohl 's word on that. He used the kickstart recently and found some flaws as well as improvables.

[mischah]

@mpohl Feedback of any kind is highly appreciated 😙

[mischah]

Closing this.
Issue might be recreated in the upcoming Baumeister Repo.