Feature request: Time to completion and checkpointing

[Army Research Lab]

I'd like to make a feature request; if the algorithm is amenable to it, it'd
be nice if gperf could output an estimated time to completion for any given
run.  Even better would be some kind of automatic checkpointing, so that if
a long run gets interrupted, gperf can restart at the last checkpoint.
Currently, I've been running for about 5-6 days, and I'm going to have to
reboot my machine soon to get the latest patches installed.  All things
considered, that is fairly inconvenient.

Thanks,
Cem Karan