```
[] ~/projects/jruby $ jruby -Xcompile.cache.classes -X+C -S gem -v
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java.class
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/core_ext.class
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/java/java_ext.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/jruby_dot_jar/jruby/preludes.class
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/kernel/enc_prelude.class
saved compiled script as /Users/headius/.ir/uri_3a_classloader_3a_/jruby/kernel/gem_prelude.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/rbconfig.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/stringio.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/rubygems/defaults/operating_system.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/jar_install_post_install_hook.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/jars/post_install_hook.class
no class found for script /Users/headius/projects/jruby/bin/gem
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/bin/gem.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/bin/jgem.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/etc.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/gems/shared/gems/yard_minus_0_dot_9_dot_20/lib/rubygems_plugin.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/psych_jars.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/jar_minus_dependencies.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/cgi/escape.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/strscan.class
saved compiled script as /Users/headius/.ir/Users/headius/projects/jruby/lib/ruby/stdlib/psych/visitors.class
2.7.10
```