vojtad

# frozen_string_literal: true

class CreateSignedCloudfrontUrl < Service
  attr_reader :url, :expires_at

  def initialize(url:, expires_in:)
    @url = url
    @expires_at = expires_in.from_now.to_i
  end

vojtad

import AWS from 'aws-sdk';

export default class AwsS3MultipartHelper {
  constructor(options) {
    this.options = {
      bucket: options.bucket,
      acl: options.acl || 'public-read',
      expires: options.expires || 5 * 60,
    };

vojtad

module MonkeyPatches
  #
  # Monkey patch ActionView::CollectionCaching#cache_collection_render included in ActionView::PartialRenderer.
  # This helps prevent N+1 for uncached entries when rendering cached collection.
  # This patch allows us to specify modify_uncached_collection Proc. The Proc is called with collection of uncached entries as argument. Its result should be Array. It is used as new collection for rendering.
  #
  # Setup:
  #
  # Add this line to monkey_patches.rb initializer.
  # ActionView::PartialRenderer.prepend(MonkeyPatches::ActionViewPartialRendererCollectionCaching)

vojtad

Benchmarking two ways of checking if module is defined using its name in string.

begin
  'ModuleName'.constantize
rescue NameError
  # ignored
end

Object.const_defined?('ModuleName')

vojtad

Runtime

@a = 'A', @b = 'B'
Warming up --------------------------------------
s = s + @a; s = s + @b
                        49.000  i/100ms
     s += @a; s+= @b    51.000  i/100ms
s = "#{s}#{@a}"; s = "#{s}#{@b}"
                        50.000  i/100ms
s.concat(@a).concat(@b)

vojtad

Rendered JSON is ~250 KB in size.

Runtime benchmarks

Warming up --------------------------------------
   render json: data    20.000  i/100ms
render json: data.to_json
                        27.000  i/100ms
render json: ActiveSupport::JSON.encode(data)
                        26.000  i/100ms