json-jruby-leak.rb

require 'java'
require 'benchmark'
require 'rubygems'
require 'json/common'
require 'json/ext/parser'

def foo
  Benchmark.measure {
    sc = org.jruby.embed.ScriptingContainer.new(org.jruby.embed.LocalContextScope::THREADSAFE)
    sc.runScriptlet("require 'rubygems'")
    sc.runScriptlet("require 'json/common'")
    sc.runScriptlet("require 'json/ext/parser'")
    sc.clear
    sc.terminate
    sc = nil
  }
end

i = 0
puts RUBY_DESCRIPTION
while(true)
  i += 1
  t = foo
  JRuby.gc
  printf "loop: %3d  time: %*.4f  mem: %10d\n", i, 7, t.total, Java::JavaLang::Runtime.getRuntime.totalMemory
end