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Rails applications that use ActiveRecord objects in their cache may experience an issue where the entries cannot be invalidated if all of these conditions are true: They are using Rails 5.2+ They have configured config.active_record.cache_versioning = true They are using a cache that is not maintained by Rails, such as dalli_store (2.7.8 or prior) In this post, we discuss the background to a chang
This is the first in a series of blog posts examining the evolution of web app architecture over the past 10 years. This post examines the forces that have driven the architectural changes and a high-level view of a new architecture. In future posts, we’ll zoom in to details of specific parts of the system. The standard web application architecture suitable for many organizations has changed drast
The asset pipeline is the slowest part of deploying a Rails app. How slow? On average, it's over 20x slower than installing dependencies via $ bundle install. Why so slow? In this article, we're going to take a look at some of the reasons the asset pipeline is slow and how we were able to get a 12x performance improvement on some apps with Sprockets version 3.3+. The Rails asset pipeline uses the
This article introduces incremental garbage collection (GC) which has been introduced in Ruby 2.2. We call this algorithm RincGC. RincGC achieves short GC pause times compared to Ruby 2.1. About the Author: Koichi Sasada works for Heroku along with Nobu and Matz on C Ruby core. Previously he wrote YARV Ruby's virtual machine, and he introduced generational GC (RgenGC) to Ruby 2.1. Koichi wrote inc
How to blend a rock-solid CMS and API with the absolute best in front-end tooling, built as a single project and hosted seamlessly on Heroku. Rails is an incredible framework, but modern web development has moved to the front-end, meaning sometimes you don’t need all the bulk of the asset pipeline and the templating system. In Rails 5 you can now create an API-only Rails app, meaning you can build
I sat down with some Ruby friends in Hiroshima last year to have a conversation about just-in-time compilation for Ruby, specifically the new MJIT method-based implementation. Those of you who are already familiar with JITs and how they work might want to skip directly to the interview, the rest of us are going to hang out for a minute and learn about how things presently work in Ruby, and what it
The Ruby maintainers continued their annual tradition by gifting us a new Ruby version to celebrate the holiday: Ruby 2.4 is now available and you can try it out on Heroku. Ruby 2.4 brings some impressive new features and performance improvements to the table, here are a few of the big ones: Binding#irb – Runtime Invocation for IRB Unified Integers – Fixnum and Bignum are now Integer Rounding Chan
Andrey Petrov is the author of urllib3, the creator of Briefmetrics and ssh-chat, and a former Googler and YCombinator alum. He’s here to tell us of a dangerous expedition his requests undertook, which sent them from Python, through the land of C, to a place called Go (and back again). Today we're going to make a Python library that is actually the Go webserver, for which we can write handlers in
It's been one year since Action Cable debuted at RailsConf 2015, and Sophie DeBenedetto is here to answer the question in the minds of many developers: what is it really like to implement "the highlight of Rails 5"? Sophie is a web developer and an instructor at the Flatiron School. Her first love is Ruby on Rails, although she has developed projects with and written about Rails, Ember and Phoenix
What is Kafka? Apache Kafka is a distributed commit log for fast, fault-tolerant communication between producers and consumers using message based topics. Kafka provides the messaging backbone for building a new generation of distributed applications capable of handling billions of events and millions of transactions. Take control of your events Events are everywhere — user activity streams, log e
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