jjb

# in default config, ActionMailer will use sidekiq wrapped in ActiveJob
# This makes it so there is no obvious/direct place to specify configuration
# It's easy to do with the below method, which can be placed in an initializer

Rails.application.config.after_initialize do
  ActionMailer::MailDeliveryJob.class_eval do
    sidekiq_options retry: 2
  end
end

jjb

require 'benchmark/ips'
require "benchmark/memory"

Benchmark.ips do |x|
  x.report("rand") do
    rand
  end

  x.report("rand(100)") do
    rand(100)

jjb

First, install your preferred version of postgres

sudo port install posgresql84

Now you have psql84 available, which rolls right off your fingers. Even better, your pg_config is buried in a postgresql84 namespace. Fix both of these with:

sudo port select --set postgresql postgresql84

Now you can intall the gem

jjb

#!/usr/bin/env sh

# usage
# shipyard-shell PRNUMBER SERVICENAME
# shipyard-shell 6187 postgres
# shipyard-shell 6187 api

pr=$1
service=$2
identifier=`shipyard get environments | grep pr$pr | xargs | cut -w -f1` # xargs to remove leading and trailing whitespace

jjb

apt update
apt install -y apt-file
apt-file update

apt-file find psql
apt-file find bin/psql
apt-file find postgresql.conf
apt-file find --fixed-string convert # equivalent of .*convert.*, way too much
apt-file find --fixed-string /usr/bin/convert # need to know exact path
apt-file find --regexp '.*bin/convert$' # bingo. would also pick up .../sbin/

jjb

old=`pbpaste`
`echo '#{ENV['THE_TEXT']}' | pbcopy`
3.downto(0) do |second|
  `osascript -e 'display notification "Reseting clipboard in #{second} seconds" with title "TMP Clipboard"'`
  sleep 1
end
`echo '#{old}' | pbcopy`

jjb

invoke with bin/jemalloc rails s

We weren’t using 3 before, but have been running 5 in prod for ~10 months now, we saw ~25% less memory usage compared to default malloc

see also https://gist.github.com/jjb/9ff0d3f622c8bbe904fe7a82e35152fc

jjb

1. hello
2. hello
   1. nested
   2. nested
      1. more
      2. more
         1. and again

            puts "hello"

jjb

1. Preferences -> Variables
2. add this to the front of PATH: $HOME/.rbenv/bin:$HOME/.rbenv/shims:
3. set TM_RUBY to this: $HOME/.rbenv/shims/ruby
4. populate RBENV_VERSION with your version. example: 2.1.0-preview1
5. (and make sure the checkboxes for each of those variables is selected)

jjb

• runner does not use executor in <7, does use it in >=7
• console does not use executor in <7, not sure about >=7