tenderlove

# How to measure the size of a method's iseq

require 'objspace'

small_body = (["bar"] * 10).join(" + ")
big_body = (["bar"] * 10_000).join(" + ")

eval "def small(bar); #{small_body}; end"
eval "def big(bar); #{big_body}; end"

tenderlove

#ifdef __GNUC__
# pragma GCC system_header
#endif

tenderlove

Benchmarks for GC Compactor

GC benchmarks for trunk vs gc-compact seem to be about the same:

$ make benchmark ITEM=gc
./revision.h unchanged
/Users/aaron/.rbenv/shims/ruby --disable=gems -rrubygems -I./benchmark/lib ./benchmark/benchmark-driver/exe/benchmark-driver \
	            --executables="compare-ruby::/Users/aaron/.rbenv/shims/ruby --disable=gems -I.ext/common --disable-gem" \
	            --executables="built-ruby::./miniruby -I./lib -I. -I.ext/common  -r./prelude --disable-gem" \

tenderlove

require 'fiddle'

color_iter = DATA.readlines.map(&:chomp).map { |i|
  i = i.to_i(16)
  [(i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF, 255]
}.each

SIZEOF_HEAP_PAGE_HEADER_STRUCT = Fiddle::SIZEOF_VOIDP

SIZEOF_RVALUE           = 40

tenderlove

begin
  Integer("foo", exception: false)

  def parse_int string, default
    Integer(string, exception: false) || default
  end
rescue TypeError
  def parse_int string, default
    Integer(string)
  rescue

tenderlove

From 8f74c91274a7e1072685aded111e89d55ced0f96 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Sun, 21 Oct 2018 16:12:16 -0700
Subject: [PATCH] Collapse putobject, putobject, newarray

This collapses:

```== disasm: #<ISeq:bar@bench.rb:3 (3,0)-(5,3)> (catch: FALSE)
0000 putobject                    "a"                                 (   4)[LiCa]
0002 putobject                    "b"

tenderlove

From 8f74c91274a7e1072685aded111e89d55ced0f96 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Sun, 21 Oct 2018 16:12:16 -0700
Subject: [PATCH] Collapse putobject, putobject, newarray

This collapses:

```== disasm: #<ISeq:bar@bench.rb:3 (3,0)-(5,3)> (catch: FALSE)
0000 putobject                    "a"                                 (   4)[LiCa]
0002 putobject                    "b"

tenderlove

From 8f74c91274a7e1072685aded111e89d55ced0f96 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Sun, 21 Oct 2018 16:12:16 -0700
Subject: [PATCH] Collapse putobject, putobject, newarray

This collapses:

```== disasm: #<ISeq:bar@bench.rb:3 (3,0)-(5,3)> (catch: FALSE)
0000 putobject                    "a"                                 (   4)[LiCa]
0002 putobject                    "b"

tenderlove

# extract dead objects from the heap

require 'json'
require 'set'

class Slot
  attr_reader :info, :address_to_slot

  def initialize info, address_to_slot
    @info            = info

tenderlove

require 'ds9'
require 'socket'
require 'uri'
require 'google/protobuf'
require 'io/wait'
require 'helloworld_pb'

class MySession < DS9::Client
  def initialize sock
    @sock      = sock