jeremy

# $ ruby -Ilib active_support_test.rb
# ActiveSupport eating 2214 KB, loaded in 92 ms

require 'rubygems'

unless ENV['stdlib']
  %w( active_support/vendor English base64 benchmark bigdecimal blankslate
      builder cgi date date/format digest/md5 drb enumerator fast_xs fcntl
      fileutils iconv kconv logger memcache mocha monitor openssl pathname
      rational rexml/document securerandom set singleton stringio strscan

jeremy

Index: intern.h
===================================================================
--- intern.h	(revision 20354)
+++ intern.h	(working copy)
@@ -269,6 +269,15 @@
 VALUE rb_gc_enable _((void));
 VALUE rb_gc_disable _((void));
 VALUE rb_gc_start _((void));
+VALUE rb_gc_enable_stats _((void));
+VALUE rb_gc_disable_stats _((void));

jeremy

$ irb
>> class Foo; def to_yaml(options); 'abc'.to_yaml(options) end end
=> nil
>> { 'foo' => Foo.new }.to_yaml
=> "--- \nfoo: abc\n"

$ jirb
>> class Foo; def to_yaml(options); 'abc'.to_yaml(options) end end
=> nil
>> { 'foo' => Foo.new }.to_yaml                                   

jeremy

$ irb
>> module M; protected; attr_reader :foo end
=> nil
>> class C; include M end
=> C
>> C.public_instance_methods.include?('foo')
=> false

$ jirb
>> module M; protected; attr_reader :foo end

jeremy

# ruby-1.8.6-ree profile_requires.rb config/environment
GC.enable_stats

$file_heap_growth = []
module TrackHeapGrowth
  def require(file, *args)
    heap_before, objects_before, live_before = GC.allocated_size, ObjectSpace.allocated_objects, ObjectSpace.live_objects
    result = nil
    elapsed = Benchmark.realtime { result = super }
    heap_after, objects_after, live_after = GC.allocated_size, ObjectSpace.allocated_objects, ObjectSpace.live_objects

jeremy

# ruby-1.8.6-ree profile_startup.rb process_time|allocations|memory
# kcachegrind profile_startup.memory.tree
require 'rubygems'
require 'ruby-prof'

ENV['RAILS_ENV'] = 'development'

mode = ARGV.shift || 'process_time'
RubyProf.measure_mode = RubyProf.const_get(mode.upcase)
RubyProf.start

jeremy

From 273f56bd6c23bea5ca910af689aa44d4ca56cb7b Mon Sep 17 00:00:00 2001
From: Jeremy Kemper <jeremy@bitsweat.net>
Date: Fri, 27 Feb 2009 14:13:32 -0800
Subject: [PATCH 1/4] Rather than check socket.closed? on every read/write, connect once and reconnect on exceptions

---
 lib/redis.rb |   45 ++++++++++++++++++++++++---------------------
 1 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/lib/redis.rb b/lib/redis.rb

jeremy

$ ruby-1.9 -e 'puts __ENCODING__'
UTF-8
$ jruby --1.9 -e 'puts __ENCODING__'
-e:1: undefined local variable or method `__ENCODING__' for main:Object (NameError)

jeremy

$ ruby-1.9 -e "module A; B = 1 end; class C; include A end; puts C.constants(false).inspect"
[]
$ jruby --1.9 -e "module A; B = 1 end; class C; include A end; puts C.constants(false).inspect"
:1:in `constants': wrong # of arguments(1 for 0) (ArgumentError)
	from :1

jeremy

#!/usr/bin/env ruby
class FooArray < Array; end
a = FooArray.new(1000000){'a'}
a = nil
GC.start
count = ObjectSpace.each_object(FooArray) {}
puts "#{count} objects remain after garbage collection"