Savepower is a simple and effective daemon for the cpufreq userspace governor. It is designed for workstations and servers, where all actions have to be done at the fastest speed, and after some idle time, maximum power savings are desired. It increases clock frequency to the maximum immediately on busy CPUs, and reduces the clock to the lowest frequency after a period of inactivity. The polling frequency is 1 second and can easily be shortened.
SignPDF is a simple command line application to sign a PDF document. It can sign a PDF document with a valid certificate, encrypt/protect a PDF document, and timestamp a PDF document (optional feature). A JKS keystore with a cert signed by your desired CA is mandatory for use. The tsa_url of a timestamp server can be used to timestamp your documents. The signed PDF file is signed and protected with allowed restrictions to printing, content copying, and content copying for accessibility. By default, SignPDF creates a configuration file at ~/.signpdf, which can be edited for further use.
Thanks for the comment hropatyr, unfortunately I can't reproduce your results. Could anybody do some reproducible benchmarks?