```
[] ~/projects/jruby $ jruby -rbenchmark/ips -e 'Benchmark.ips {|ips| ips.report { caller } }'
Warming up --------------------------------------
                         1.000  i/100ms
Calculating -------------------------------------
                         29.909  (±76.9%) i/s -     47.000  in   5.070658s

[] ~/projects/jruby $ rvm jruby-9.2.9.0 do jruby -rbenchmark/ips -e 'Benchmark.ips {|ips| ips.report { caller } }'
Warming up --------------------------------------
                         1.038k i/100ms
Calculating -------------------------------------
                         11.672k (± 5.3%) i/s -     58.128k in   4.996813s
```