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        iperl> my $foo = "abc"
    
    ...
        iperl> print $bar
         
        Use of uninitialized variable in...
    
  2. or download this
        iperl> use IPerl::Mixins::Benchmark
    
    ...
          4 wallclock secs ( 1.58 usr +  0.19 sys =  1.77 CPU)
    
        iperl>