serel 0.3.2 has been measured as reducing the boot time of the last phase of boot by as much as 38%. The reduction in boot time due to parallelism is highly dependent upon configuration, the smallest reduction measured to date is 8%.
The patches for rc under Red Hat Linux and Debian GNU/Linux have a similar function. When booting to a multiuser runlevel, rc starts the serel daemon, confirms the integrity of the dependencies, and runs the S??* scripts in parallel. The default configuration generates the visualisation log file whenever the history database changes.
The present serel implementation aims for robust delivery of a few core features, and leaves ample scope for future boot time improvement.