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module FactoryGirl
  module Doctor
    module FloatDuration
      refine Float do
        def duration
          t = self
          format("%02d:%02d.%03d", t / 60, t % 60, t.modulo(1) * 1000)
        end
      end
    end

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# if you want to render flamegraphs
gem "stackprof", require: false # required by flamegraph
gem "flamegraph", require: false

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gem 'stackprof', require: false
gem 'ruby-prof', require: false

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Add the following to application.rb:

$icallbacks = []
$icallbacks.define_singleton_method(:print) do
  puts sort_by { |(a, b)| -b }.map { |(a, b)| "#{b}\t\t#{a}" }.join("\n")
end

ActiveSupport::Notifications.subscribe("load_config_initializer.railties") do |event|
 $icallbacks << [event.payload[:initializer], event.duration]

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Action Cable over SSE

This is a demo of leveraging the proposed Action Cable architecture to implement an SSE transport for Action Cable (without changing the user-space code, e.g., Connection and Channel classes).

Start the server by running the following command:

 ruby main.rb

Now, you can connect to Action Cable over SSE via cURL as follows:

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# frozen_string_literal: true

require "benchmark_driver"

source = <<~RUBY

class Hash
  def symbolize_keys
    transform_keys { |key| key.to_sym rescue key }
  end

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# From https://evilmartians.com/chronicles/viewcomponent-in-the-wild-embracing-tailwindcss-classes-and-html-attributes
class ApplicationViewComponent < ViewComponentContrib::Base
  # Move default attrs to a constants so we can re-use it
  EMPTY_ATTRS = {}.freeze

  class << self
    def html_option(name, default: nil, **opts)
      if default
        opts[:type] = proc { default.merge(_1) }
      end

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Installation

Go to the official website and choose your OS.

MacOS

Docker for Mac has a problem is the disk IO performance (see docker/for-mac#77).

There is a fix (https://github.com/IFSight/d4m-nfs) which makes Docker use NFS instead of OSXFS.

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RSpec.shared_context "bullet" do
  before(:each) do
    Bullet.enable = true
    Bullet.bullet_logger = true
    Bullet.raise = true # raise an error if N+1 query occurs
    Bullet.start_request
  end

  after(:each) do
    Bullet.perform_out_of_channel_notifications if Bullet.notification?

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# frozen_string_literal: true

# Patch Wisper to disable broadcasting by default
# (to speed up tests).

# Profile Wisper publishing via EventProf
TestProf::EventProf.monitor(Wisper::Publisher, "wisper.publisher.broadcast", :broadcast)

module Wisper
  module Testing