Benchmark: running s///, tr///, each for at least 10 CPU seconds...
      s///: 11 wallclock secs (10.52 usr +  0.01 sys = 10.53 CPU) @ 72.08/s (n=759)
     tr///: 10 wallclock secs (10.53 usr +  0.01 sys = 10.54 CPU) @ 61.29/s (n=646)
        Rate tr///  s///
tr/// 61.3/s    --  -15%
s///  72.1/s   18%    --
OK