Buildr Startup Time Boost

command_line.txt

# First run from cold JVM
→ time buildr clean test
...
Completed in 47.557s
buildr clean test  60.39s user 4.52s system 129% cpu 50.172 total


# Start nailgun in the background
→ jruby --ng-server &                                                                                                       
[1] 39845


# Tell JRuby/Buildr to use the nailgun server
→ export JRUBY_OPTS="--ng"


# Run tests again using nailgun JVM
→ time buildr clean test
...
Completed in 28.596s
buildr clean test  0.01s user 0.04s system 0% cpu 37.162 total


# Subsequent runs are even faster
→ time buildr clean test
...
Completed in 27.039s
buildr clean test  0.01s user 0.04s system 0% cpu 33.382 total