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  1. or download this
    perl -MTime::HiRes=time -E"$|++;say scalar localtime while sleep 1" 
    | tee junk.log
...
Fri Feb  5 22:43:01 2010
Fri Feb  5 22:43:02 2010
...
  2. or download this
    tail -f junk.log 
   |perl -MTime::HiRes=gettimeofday -E"$|++;say gettimeofday().' '.$_ 
+while <>"
...
1265410427.993 Fri Feb  5 22:49:42 2010
Terminating on signal SIGINT(2)
1265410427.998 Fri Feb  5 22:49:43 2010