~/projects/jruby ➔ jruby -e "def foo; foo; end; foo"
Error: Your application used more stack memory than the safety cap of 1024k.
Specify -J-Xss####k to increase it (#### = cap size in KB).
Specify -w for full StackOverflowError stack trace

LoadService: trying builtinLib: builtin/core_ext/symbol.class
LoadService: trying builtinLib: builtin/core_ext/symbol.rb
LoadService: trying resourceFromLoadPath: /Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/core_ext/symbol.class
LoadService: trying resourceFromLoadPath: /Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/core_ext/symbol.rb
LoadService: trying resourceFromLoadPath: /Users/headius/projects/jruby/lib/ruby/site_ruby/shared/builtin/core_ext/symbol.class

~/projects/jruby ➔ jruby -e "require 'fcntl'; p Fcntl.constants"
["F_SETFL", "FREAD", "F_GETFL", "F_LOG2PHYS", "F_RDLCK", "F_PATHPKG_CHECK", "F_SETFD", "F_FREEZE_FS", "F_SETSIZE", "FFSYNC", "F_NOCACHE", "F_ADDSIGS", "F_RDAHEAD", "F_ALLOCATECONTIG", "F_ALLOCATEALL", "F_GLOBAL_NOCACHE", "FWRITE", "F_SETLKW", "F_SETOWN", "FNDELAY", "FASYNC", "F_THAW_FS", "FAPPEND", "F_FULLFSYNC", "F_MARKDEPENDENCY", "F_SETLK", "F_CHKCLEAN", "F_PREALLOCATE", "F_WRLCK", "F_WRITEBOOTSTRAP", "F_READBOOTSTRAP", "F_GETOWN", "F_GETLK", "F_GETPATH", "F_DUPFD", "F_UNLCK", "FNONBLOCK", "F_GETFD", "F_RDADVISE"]

~/projects/jruby ➔ ruby -e "require 'fcntl'; p Fcntl.constants"
["F_DUPFD", "F_WRLCK", "O_ACCMODE", "F_SETLKW", "O_NDELAY", "F_SETFD", "O_NOCTTY", "F_UNLCK", "O_WRONLY", "F_SETLK", "O_NONBLOCK", "F_GETLK", "O_EXCL", "F_RDLCK", "O_RDWR", "F_SETFL", "O_APPEND", "F_GETFD", "O_CREAT", "FD_CLOEXEC", "O_RDONLY", "F_GETFL", "O_TRUNC"]

require 'spec/ruby'

if ::Spec::Ruby.version < "1.8.7"
  # based on Bounded Spec InstanceExec (Mauricio Fernandez)
  # http://eigenclass.org/hiki/bounded+space+instance_exec

require 'benchmark'

(ARGV[0] || 1).to_i.times do
  Benchmark.bm(30) do |bm|
    bm.report("control") { 1_000_000.times { a = ''; a = 'hello'; a = 'hello'; a = 'hello' } }

diff --git a/src/java/org/jruby/ext/openssl/x509store/Purpose.java b/src/java/org/jruby/ext/openssl/x509store/Purpose.java
index 59df5e7..9a2a668 100755
--- a/src/java/org/jruby/ext/openssl/x509store/Purpose.java
+++ b/src/java/org/jruby/ext/openssl/x509store/Purpose.java
@@ -32,6 +32,7 @@ import java.util.ArrayList;

if alpha
  if beta
    if charlie
      if delta
        echo

    [java] 
     [java] 1)
     [java] 'Struct aligns fields correctly long long, followed by an int' FAILED
     [java] expected: 64,
     [java]      got: 16 (using ==)

◆ ruby -e "p(0.7 * 24)"
16.8

◆ jruby -e "p(0.7 * 24)"
16.799999999999997

masgn an expression (array is needed):

    LINENUMBER 1 L0
    ALOAD 1
    ICONST_0

Multiple assignment benchmark

JRuby 1.2
                                              user     system      total        real
control, 1m while loop                    0.056000   0.000000   0.056000 (  0.055758)

JRuby
                                              user     system      total        real
control, 1m while loop                    0.052000   0.000000   0.052000 (  0.051715)
near closure, 1m x10 a,a=a,a              0.067000   0.000000   0.067000 (  0.066145)
in closure, 1m x10 a,a=a,a                0.055000   0.000000   0.055000 (  0.055218)

[headius @ cnutter:~/projects/rbx]
◆ ruby benchmark/rubinius/bm_splat.rb
Rehearsal ---------------------------------------------------
a = 1             0.160000   0.000000   0.160000 (  0.158555)
a,b = *splat      0.410000   0.000000   0.410000 (  0.414168)

require 'benchmark'

def bench_rescue(bm)
  bm.report("control") { 1_000_000.times { foo1 } }
  bm.report("one rescue") { 1_000_000.times { foo2a } }

JRuby
                                              user     system      total        real
control                                   0.090000   0.000000   0.090000 (  0.089813)
one rescue                                0.269000   0.000000   0.269000 (  0.269248)
one rescue + raise                        0.253000   0.000000   0.253000 (  0.253457)