eregon

def Process.rss
  Integer(`ps -o rss= -p #{Process.pid}`) * 1024
end

def mb(bytes)
  return '?' if bytes == nil or bytes < 0
  mb = bytes / 1024.0 / 1024.0
  "#{mb.to_i} MB"
end

eregon

immutable = deeply frozen

Immutable classes

Immutable core classes

• TrueClass
• FalseClass
• NilClass
• Integer

eregon

command = ARGV
start = Process.clock_gettime Process::CLOCK_MONOTONIC, :millisecond

IO.popen(command, err: [:child, :out]) do |io|
  while line = io.gets
    now = Process.clock_gettime Process::CLOCK_MONOTONIC, :millisecond
    puts "[#{"%5d" % (now - start)}] #{line}"
  end
end

eregon

require 'tmpdir'
require 'rbconfig'

def inline_c_extension(c_code)
  Dir.mktmpdir('inline_c_extension') do |dir|
    File.write("#{dir}/cext.c", c_code)
    File.write("#{dir}/extconf.rb", <<~RUBY)
    require 'mkmf'
    create_makefile('cext')
    RUBY

eregon

Ruby Implementation	Speedup relative to 2.7.2
Ruby 2.7.2	1.00x
Ruby 2.7.2 --jit	1.16x
Ruby 3 dev	0.81x
Ruby 3 dev --jit	1.08x
TruffleRuby CE 20.2 --jvm	19.73x
TruffleRuby EE 20.2 --jvm	31.54x

The median i/s result out of 3 is used to compute speedups.

eregon

$ ruby -ve 'puts ObjectSpace.each_object(Module).flat_map { |mod| mod.instance_methods(false).map { |name| mod.instance_method(name) }.select { |meth| meth.source_location && meth.source_location[0].start_with?("<internal:") }.map { |meth| "#{meth} #{meth.source_location.join(":")}" } }'
ruby 2.3.8p459 (2018-10-18 revision 65136) [x86_64-linux]
#<UnboundMethod: #<Class:Thread>#exclusive> <internal:prelude>:12
#<UnboundMethod: IO#read_nonblock> <internal:prelude>:75
#<UnboundMethod: IO#write_nonblock> <internal:prelude>:133

eregon

I added `x.compare!` in bin/benchmark

$ cd ext
$ rake
$ cd ..

$ gem install ffi-compiler benchmark-ips
$ ruby -Ilib bin/benchmark

ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-linux]

eregon

#!/usr/bin/env ruby

private def benchmark(name = nil, &block)
  raise "needs a block" unless block
  binding = block.binding

  file, line = block.source_location
  start_line = line - 1
  lines = File.readlines(file)
  indent = lines.fetch(start_line)[/^(\s+)/, 1]

eregon

Introductory Material

• Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/

• The SimpleLanguage, an example of using Truffle with great JavaDocs. It is the officle getting-started project: https://github.com/graalvm/simplelanguage

• Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

eregon

--- full.txt	2020-03-05 17:04:32.230794000 +0900
+++ short.txt	2020-03-05 17:04:38.445322000 +0900
@@ -1,179 +1,3 @@
-1.8.5-p52
-1.8.5-p113
-1.8.5-p114
-1.8.5-p115
-1.8.5-p231
-1.8.6
-1.8.6-p36