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Janko Marohnić janko

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janko / benchmark.rb
Last active Sep 11, 2020
Comparing performance of Sequel and Active Record when fetching 1000 records
View benchmark.rb
require "bundler/inline"
gemfile do
source "https://rubygems.org"
gem "activerecord", "6.0.3.3", require: "active_record"
gem "sequel", "5.36"
gem "sequel_pg", "1.13.0", require: false
gem "pg", "1.2.3"
gem "mysql2", "0.5.3"
@janko
janko / shrine-cli.rb
Created Mar 24, 2020
The CLI I wrote for creating new AWS S3 buckets for reproducing issues reported for Shrine. It's can serve as an example for programmatically creating new S3 buckets with bucket-specific credentials.
View shrine-cli.rb
#!/usr/bin/env ruby
require "dry/cli"
require "aws-sdk-s3"
require "aws-sdk-iam"
require "json"
ENV["AWS_ACCESS_KEY_ID"] = "..."
@janko
janko / application_controller.rb
Last active Oct 31, 2019
Simpler implementation of ActionController::Live
View application_controller.rb
class ApplicationController < ActionController::Base
private
def stream_body(async: false, **options, &block)
self.status ||= 200
self.headers["Cache-Control"] = "no-cache"
self.headers.delete("Content-Length")
stream_class = async ? AsyncStream : Stream
@janko
janko / results
Last active Aug 24, 2019
MiniMagick vs libvips benchmark (generating a 500x500 thumbnail)
View results
width, imagemagick, libvips
1000, 0.129, 0.045
1500, 0.190, 0.067
2000, 0.276, 0.054
2500, 0.380, 0.068
3000, 0.498, 0.085
@janko
janko / script.rb
Last active Jan 25, 2019
Ruby operator coercion inconsistency
View script.rb
Value = Struct.new(:value) do
def coerce(other)
puts "called #{self}#coerce(#{other.inspect})"
[Value.new(other), self]
end
def +(other)
puts "called #{self} + #{other.inspect}"
end
@janko
janko / derivate_endpoint.md
Last active Nov 18, 2018
Plans for the new derivate_endpoint Shrine plugin
View derivate_endpoint.md

Derivate Endpoint

Derivate blocks are executed in context of the uploader instance:

class ImageUploader < Shrine
  plugin :derivate_endpoint

  derivate :thumbnail do |file, context|
@janko
janko / script.rb
Created Oct 29, 2018
Zip unpacking with Shrine while retaining the same directory structure
View script.rb
require "sequel"
require "shrine"
require "shrine/storage/memory"
require "zip"
require "tempfile"
require "securerandom"
DB = Sequel.sqlite
DB.create_table :archives do
primary_key :id
@janko
janko / script.rb
Last active Apr 30, 2020
Workaround for embedded documents in shrine-mongoid
View script.rb
require "mongoid"
require "shrine"
require "shrine/storage/memory"
require "stringio"
Mongoid.configure do |config|
config.clients.default = { hosts: ['localhost:27017'], database: 'my_db' }
config.log_level = :debug
end
@janko
janko / benchmark.rb
Last active Sep 16, 2018
Benchmarking different ways of filtering by the associated dataset in SQL
View benchmark.rb
require "sequel"
require "benchmark"
system "createdb testing"
DB = Sequel.postgres("testing")
at_exit do
DB.disconnect
system "dropdb testing"
end
@janko
janko / Gemfile
Created May 31, 2018
Memory profiling of http.rb and other popular Ruby HTTP client libraries
View Gemfile
source "https://rubygems.org"
gem "roda"
gem "http", "~> 3.3"
gem "rest-client"
gem "httparty"
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