jruby +indy object creation much slower

_UPDATE: MY BAD_

indy slowdown was due to me havint JRUBY_OPTS include -J-XX:+TieredCompilation and
-J-XX:TieredStopAtLevel=1, supposedly to make startup faster. Removing them 
removes the performance issue. Jira ticket closed.

bench_obj_creation.rb

# Benchmark object creation with/without indy. Call with the word "true" or "false" as the only argument, corresponding
# to how indy is set, e.g.
#
# for i in 1 2 3 4; 
#   do for indy in true false; 
#     do jruby --server -Xcompile.invokedynamic=$indy obj_creation_bench.rb $indy; 
#   done; 
# done



require 'benchmark'
require 'benchmark/ips'

seconds = 30  # Test for this long
subobjects = [1, 10, 100]  # Create this many subobjects (B) added to primary object (A)


class A
  attr_accessor :subs
  def initialize
    @subs = []
  end
  
  def add(i)
    subs << B.new(i)
  end
  
  def add_a_bunch(t)
    t.times do |i|
      add(i)
    end
  end
end

class B
  def initialize(i)
    @int = i
  end
end

puts RUBY_DESCRIPTION
indy = ARGV[0]
Benchmark.ips(seconds) do |x|
  subobjects.each do |so|
    x.report("indy=#{indy} #{so} objs") do
      a = A.new
      a.add_a_bunch(so)
    end
  end
end

puts "\n\n"

mean_results

> jruby -v
jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]

# Create a simple object, then create a number of subobjects and add them to the main object.
# Averaged out results over five runs (passing 30 seconds to Benchmark.ips), 
# calling with -Xcompile.invokedynamic=true / false appropriately

#sobjs   +indy i/s    noindy i/s
  1      202_266.0    925_029.8
 10       57_060.4    264_968.8
100        7_098.6     32_453.0

raw_results.txt

jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]
Calculating -------------------------------------
    indy=true 1 objs      9150 i/100ms
   indy=true 10 objs      4111 i/100ms
  indy=true 100 objs       640 i/100ms
-------------------------------------------------
    indy=true 1 objs   193809.6 (±2.8%) i/s -    5810250 in  30.004000s
   indy=true 10 objs    54932.4 (±2.1%) i/s -    1648511 in  30.024000s
  indy=true 100 objs     6818.3 (±2.1%) i/s -     204800 in  30.050000s


jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 [darwin-x86_64]
Calculating -------------------------------------
   indy=false 1 objs     22165 i/100ms
  indy=false 10 objs     15336 i/100ms
 indy=false 100 objs      2902 i/100ms
-------------------------------------------------
   indy=false 1 objs   959355.5 (±4.6%) i/s -   28703675 in  30.006000s
  indy=false 10 objs   263968.8 (±2.6%) i/s -    7913376 in  30.003000s
 indy=false 100 objs    31526.5 (±1.7%) i/s -     946052 in  30.017000s




jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]
Calculating -------------------------------------
    indy=true 1 objs      9084 i/100ms
   indy=true 10 objs      4352 i/100ms
  indy=true 100 objs       688 i/100ms
-------------------------------------------------
    indy=true 1 objs   204318.1 (±2.2%) i/s -    6131700 in  30.026000s
   indy=true 10 objs    59117.9 (±2.3%) i/s -    1775616 in  30.055000s
  indy=true 100 objs     7403.3 (±2.0%) i/s -     222224 in  30.032000s


jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 [darwin-x86_64]
Calculating -------------------------------------
   indy=false 1 objs     22306 i/100ms
  indy=false 10 objs     15810 i/100ms
 indy=false 100 objs      3223 i/100ms
-------------------------------------------------
   indy=false 1 objs   921170.0 (±4.2%) i/s -   27570216 in  29.987000s
  indy=false 10 objs   278675.8 (±2.0%) i/s -    8363490 in  30.024000s
 indy=false 100 objs    35031.3 (±1.7%) i/s -    1050698 in  30.002000s




jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]
Calculating -------------------------------------
    indy=true 1 objs      9146 i/100ms
   indy=true 10 objs      4471 i/100ms
  indy=true 100 objs       712 i/100ms
-------------------------------------------------
    indy=true 1 objs   204823.5 (±1.9%) i/s -    6146112 in  30.018000s
   indy=true 10 objs    59611.8 (±1.6%) i/s -    1788400 in  30.009000s
  indy=true 100 objs     7536.0 (±1.2%) i/s -     226416 in  30.049000s


jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 [darwin-x86_64]
Calculating -------------------------------------
   indy=false 1 objs     22845 i/100ms
  indy=false 10 objs     14560 i/100ms
 indy=false 100 objs      2545 i/100ms
-------------------------------------------------
   indy=false 1 objs   857788.7 (±3.4%) i/s -   25700625 in  29.998001s
  indy=false 10 objs   227483.5 (±2.0%) i/s -    6828640 in  30.030000s
 indy=false 100 objs    27001.0 (±2.0%) i/s -     811855 in  30.080000s




jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]
Calculating -------------------------------------
    indy=true 1 objs      9033 i/100ms
   indy=true 10 objs      4392 i/100ms
  indy=true 100 objs       697 i/100ms
-------------------------------------------------
    indy=true 1 objs   213573.9 (±2.7%) i/s -    6404397 in  30.010000s
   indy=true 10 objs    59031.6 (±1.6%) i/s -    1774368 in  30.066000s
  indy=true 100 objs     7323.4 (±2.1%) i/s -     219555 in  29.996000s


jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 [darwin-x86_64]
Calculating -------------------------------------
   indy=false 1 objs     22210 i/100ms
  indy=false 10 objs     15690 i/100ms
 indy=false 100 objs      3139 i/100ms
-------------------------------------------------
   indy=false 1 objs   904297.1 (±4.1%) i/s -   27051780 in  29.981001s
  indy=false 10 objs   273873.8 (±2.7%) i/s -    8221560 in  30.047000s
 indy=false 100 objs    34443.6 (±1.4%) i/s -    1035870 in  30.080000s




jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 +indy [darwin-x86_64]
Calculating -------------------------------------
    indy=true 1 objs      8696 i/100ms
   indy=true 10 objs      3958 i/100ms
  indy=true 100 objs       606 i/100ms
-------------------------------------------------
    indy=true 1 objs   194807.7 (±1.9%) i/s -    5843712 in  30.008000s
   indy=true 10 objs    52611.9 (±1.6%) i/s -    1579242 in  30.025000s
  indy=true 100 objs     6413.0 (±1.5%) i/s -     192708 in  30.056000s


jruby 1.7.5.dev (1.9.3p392) 2013-09-10 9edc566 on Java HotSpot(TM) 64-Bit Server VM 1.7.0_40-ea-b27 [darwin-x86_64]
Calculating -------------------------------------
   indy=false 1 objs     22106 i/100ms
  indy=false 10 objs     15957 i/100ms
 indy=false 100 objs      3211 i/100ms
-------------------------------------------------
   indy=false 1 objs   982539.6 (±4.9%) i/s -   29378874 in  29.996000s
  indy=false 10 objs   280845.6 (±2.8%) i/s -    8425296 in  30.025000s
 indy=false 100 objs    34264.6 (±1.8%) i/s -    1027520 in  29.998000s