```
[] ~/projects/jruby $ rm -rf ~/.ir ; time jruby --dev -Xir.writing -S rails -v
Rails 5.2.3

real	0m3.456s
user	0m4.533s
sys	0m0.710s

[] ~/projects/jruby $ time jruby --dev -S rails -v
Rails 5.2.3

real	0m6.030s
user	0m15.694s
sys	0m1.534s
```