http://advent.perldancer.org/2016/12 (Optimizing Dancer2 PT. 1) lists a bunch of XS modules which if installed would be used by Dancer2 instead of the default pure perl versions. This file provides a single task to download and install all the modules.
git clone https://github.com/jahagirdar/Task_Dancer2_XS.git
cd Task_Dancer2_XS
cpanm .