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@MarkMurphy
MarkMurphy / README.md
Last active Aug 27, 2018
ActiveRecord: Store Milliseconds (or Microseconds) in Timestamps with Rails / MySQL
View README.md

ActiveRecord: Store Milliseconds (or Microseconds) in DateTimes or Timestamps with Rails / MySQL

Milliseconds in your DateTimes or Timestamps.

We got 'em, you want 'em.

NOTE: only MySQL 5.6.4 and above supports DATETIME's with more precision than a second. For reference see MySQL 5.6.4 Changelog

Why

Shit needs to be PRECISE

@dgilperez
dgilperez / .eslintrc.js
Created Dec 15, 2015 — forked from nkbt/.eslintrc.js
Strict ESLint config for React, ES6 (based on Airbnb Code style)
View .eslintrc.js
{
"env": {
"browser": true,
"node": true,
"es6": true
},
"plugins": ["react"],
"ecmaFeatures": {
@nthj
nthj / example.rb
Last active Oct 14, 2016
Methods I like to monkey-patch onto the Object class in Ruby
View example.rb
# Say you want to look up the attrs of a Stripe Event for logging to your internal database.
attrs = begin
retriable(Stripe::APIConnectionError, Stripe::APIError, max: 25) do
# ... retrieve attrs from the Stripe event here...
end
rescue Stripe::APIConnectionError, Stripe::APIError
# We're inside an SQS queue block
throw :skip_delete # we'll just have to wait on this event, come back later
rescue Stripe::Error
notify $!
View DigitalOcean_NoVNC_Paste.js
// This will open up a prompt for text to send to a console session on digital ocean
// Useful for long passwords
(function () {
var t = prompt("Enter text to be sent to console, (This wont send the enter keystroke)").split("");
function f() {
var character = t.shift();
var i=[];
var code = character.charCodeAt();
var needs_shift = "!@#$%^&*()_+{}:\"<>?~|".indexOf(character) !== -1
@tenderlove
tenderlove / h2_puma.rb
Last active Apr 26, 2019
Demo HTTP/2 server with Puma
View h2_puma.rb
require 'socket'
require 'openssl'
require 'puma/server'
require 'ds9'
class Server < DS9::Server
def initialize socket, app
@app = app
@read_streams = {}
@write_streams = {}
@JoshCheek
JoshCheek / rails_sib.rb
Last active Feb 1, 2018
Rails app in 1 file, running with Seeing Is Believing
View rails_sib.rb
gem 'rails', '4.2.1' # prob works on others, too, but this is the one I figured it out on
require "rails"
require 'active_record'
require 'action_controller/railtie'
require 'action_view/railtie'
# ===== Configuration =====
Rails.logger = ActiveRecord::Base.logger = Logger.new $stdout
ActiveSupport::LogSubscriber.colorize_logging = false
@nkbt
nkbt / .eslintrc.js
Last active Nov 14, 2019
Strict ESLint config for React, ES6 (based on Airbnb Code style)
View .eslintrc.js
{
"env": {
"browser": true,
"node": true,
"es6": true
},
"plugins": ["react"],
"ecmaFeatures": {
@brianhempel
brianhempel / bench_rails_memory_usage.rb
Last active Oct 22, 2019
A script to test the memory usage of your Rails application over time. It will run 30 requests against the specified action and report the final RSS. Choose the URL to hit on line 45 and then run with `ruby bench_rails_memory_usage.rb`.
View bench_rails_memory_usage.rb
require "net/http"
def start_server
# Remove the X to enable the parameters for tuning.
# These are the default values as of Ruby 2.2.0.
@child = spawn(<<-EOC.split.join(" "))
XRUBY_GC_HEAP_FREE_SLOTS=4096
XRUBY_GC_HEAP_INIT_SLOTS=10000
XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0
View react-app-file-structure
.
├── actions
├── stores
├── views
│   ├── Anonymous
│   │   ├── __tests__
│   │   ├── views
│   │   │   ├── Home
│   │   │   │   ├── __tests__
│   │   │   │   └── Handler.js
@krasnoukhov
krasnoukhov / 2013-01-07-profiling-memory-leaky-sidekiq-applications-with-ruby-2.1.md
Last active Sep 28, 2019
Profiling memory leaky Sidekiq applications with Ruby 2.1
View 2013-01-07-profiling-memory-leaky-sidekiq-applications-with-ruby-2.1.md

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]
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