Drip experiments in JRuby

gistfile1.txt

# BASELINE STARTUP TIMES WITHOUT DRIP

system ~/projects/jruby $ jruby -v
jruby 1.7.1.dev (1.9.3p327) 2012-11-26 810defe on Java HotSpot(TM) 64-Bit Server VM 1.7.0_09-b05 [darwin-x86_64]

system ~/projects/jruby $ time jruby -e 1

real	0m1.238s
user	0m1.985s
sys	0m0.091s

system ~/projects/jruby $ time jruby -e 1

real	0m1.237s
user	0m2.005s
sys	0m0.091s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m4.677s
user	0m7.615s
sys	0m0.334s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m4.696s
user	0m7.652s
sys	0m0.340s

# Set JAVACMD to the `drip` executable and use JRuby's DripMain to preboot

system ~/projects/jruby $ export JAVACMD=/Users/headius/bin/drip

system ~/projects/jruby $ export DRIP_INIT_CLASS=org.jruby.main.DripMain

# First run is slow, because no Drip instances are up

system ~/projects/jruby $ time jruby -e 1

real	0m1.465s
user	0m2.443s
sys	0m0.124s

# Subsequent runs are prebooted

system ~/projects/jruby $ time jruby -e 1

real	0m0.120s
user	0m0.039s
sys	0m0.051s

system ~/projects/jruby $ time jruby -e 1

real	0m0.116s
user	0m0.039s
sys	0m0.050s

system ~/projects/jruby $ time jruby -e 1

real	0m0.119s
user	0m0.040s
sys	0m0.051s

# Rake gets a modest speedup

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m5.037s
user	0m8.192s
sys	0m0.415s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m3.883s
user	0m0.040s
sys	0m0.051s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m3.884s
user	0m0.038s
sys	0m0.049s

# We can add logic to dripmain.rb to preboot more stuff

system ~/projects/jruby $ echo "gem 'rake'; require 'rake'" > dripmain.rb

# Reset Drip instances

system ~/projects/jruby $ drip kill

# Good 50% reduction in startup...and more should be possible

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m5.406s
user	0m9.337s
sys	0m0.412s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m2.784s
user	0m0.039s
sys	0m0.052s

system ~/projects/jruby $ time jruby -S rake -T > /dev/null

real	0m2.751s
user	0m0.038s
sys	0m0.049s