bartkozal

RUBY_GC_HEAP_FREE_SLOTS=600000
RUBY_GC_HEAP_GROWTH_FACTOR=1.25
RUBY_GC_HEAP_GROWTH_MAX_SLOTS=300000
RUBY_GC_HEAP_INIT_SLOTS=600000
RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=1.3
RUBY_GC_MALLOC_LIMIT=64000000
RUBY_GC_OLDMALLOC_LIMIT=64000000
RUBY_HEAP_FREE_MIN=12500
RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
RUBY_HEAP_SLOTS_INCREMENT=100000

mperham

Go has a number of low-level crypto APIs which check off marketing bullet-points (got FIPS supprt, check!) but is missing an high-level API usable by mere mortal programmers. Imagine you want to create a document, sign it and verify that document later. Now check out Go's crypto APIs and give up in frustration after an hour of Googling.

The API should encapsulate a half-dozen common operations and make them as easy as possible. Avoid choice where possible, just pick something reasonably secure in 2014 for me and use it! I'm speaking specifically of a few basic actions (yes, this API is very naive/non-idiomatic), call it crypto/easy:

• Create me a public/private key pair and save it to the filesystem.

// create and persist a keypair to the current directory.
// this is just a one-time operation, now we have a keypair to use.
easy.CreateKeyPair()

kachayev

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

tmm1

Ruby 2.1.0 in Production: known bugs and patches

Last week, we upgraded the github.com rails app to ruby 2.1.0 in production.
While testing the new build for rollout, we ran into a number of bugs. Most of
these have been fixed on trunk already, but I've documented them below to help
anyone else who might be testing ruby 2.1 in production.

@naruse I think we should backport these patches to the ruby_2_1 branch and
release 2.1.1 sooner rather than later, as some of the bugs are quite critical.
I'm happy to offer any assistance I can to expedite this process.

hgfischer

Benchmarking Nginx with Go

There are a lot of ways to serve a Go HTTP application. The best choices depend on each use case. Currently nginx looks to be the standard web server for every new project even though there are other great web servers as well. However, how much is the overhead of serving a Go application behind an nginx server? Do we need some nginx features (vhosts, load balancing, cache, etc) or can you serve directly from Go? If you need nginx, what is the fastest connection mechanism? This are the kind of questions I'm intended to answer here. The purpose of this benchmark is not to tell that Go is faster or slower than nginx. That would be stupid.

So, these are the different settings we are going to compare:

• Go HTTP standalone (as the control group)
• Nginx proxy to Go HTTP
• Nginx fastcgi to Go TCP FastCGI
• Nginx fastcgi to Go Unix Socket FastCGI

caius

# install patched ruby-install that works with falcon patches
cd ~/sources

git clone git://github.com/caius/ruby-install
cd ruby-install
git checkout origin/autoconf-when-patching
brew install --HEAD homebrew/ruby-install.rb

# Install ruby-1.9.3-p327-perf
mkdir -p ~/src/perf

macintux

This is not intended to be comprehensive or authoritative, just free online resources I've found valuable while learning more about Erlang.

Similar lists

• 0xAX's list of Erlang bookmarks
• Federico Carrone, Erlang Spawned Shelter
• Ivan Uemlianin's list of resources on various BEAM languages
• David Robakowski's curated list of awesome Erlang libraries, resources and shiny things
• Julius Beckmann's curated list of amazingly awesome Elixir and Erlang libraries, resources and shiny things

Instruction

haileys

#!/usr/bin/env ruby
gem "parser", "~> 1.4"
require "parser"
require "parser/ruby19"
require "set"

class ConstantDeclarationAndUseProcessor < Parser::AST::Processor
  attr_reader :declared, :used

  def initialize

headius

xt-jruby-local ~/projects/jruby $ cat blah.rb
expected = (0...100000).to_a * 50
array = []


50.times.map do
  Thread.new do
    100000.times do |i|
      array << i
    end

tmm1

Finished tests in 827.814339s, 10.2281 tests/s, 34.2094 assertions/s.

8467 tests, 28319 assertions, 0 failures, 0 errors, 15 skips

real	14m21.424s
user	11m54.777s
sys	0m28.030s