I think that would actually increase the odds of collision. The work directory is locked, so for a collision to happen, the lock would need to be released and then reacquired by another instance of rdmd, all within the same interval of system clock granularity. Not to mention that the RNG is seeded from the same source (the current time), so XOR-ing the two may not increase entropy.

I could add the PID instead, I suppose?