Fixing a footgun in ActiveRecord::Core#inspect
The inspect method on Active Record models returns a string including the model’s class and a list of all its attributes and their values. In Rails 7.2, you can configure which attributes are included in the output of inspect. In this post, I’ll discuss the performance issue that led me to implement this feature. I’ll also talk about how this feature can be used to improve developer experience. to
Autotuner: How to Speed Up Your Rails App
This article was adapted from my Rails World talk “Rails and the Ruby Garbage Collector: How to Speed Up Your Rails App”. Ruby’s garbage collector is designed to be adaptable, scaling from short Ruby scripts to running apps that serve millions of requests per second. While it’s designed to be adaptable, it may not work optimally for every use case. For this reason, Ruby’s garbage collector support
Unveiling the big leap in Ruby 3.3’s IRB
In this blog post, we will delve into the major enhancements introduced in Ruby 3.3’s IRB, as well as what’s currently planned for the next year. In a nutshell, Ruby 3.3’s IRB offers improved debugging capabilities, an enhanced autocompletion experience, and an overall improved user experience. It’s worth noting that even if you don’t upgrade to Ruby 3.3 immediately, you can still install the same
Performance impact of the memoization idiom on modern Ruby
One major internal change in Ruby 3.2 was the introduction of object shapes. In this post, we’ll try to cover why they were introduced, how they work, and what their limitations are. How object instance variables are stored Because of how dynamic Ruby is, an operation as simple as accessing an instance variable is a lot of work. In most cases, Ruby objects store their instance variables in an arra
Open Sourcing Shopify’s Ruby Builds
We’ve open sourced shopify-ruby-definitions, which contains definitions to build the Ruby we use at Shopify in development, testing, and production. Our builds of Ruby are API compliant with the vanilla Rubies, but with additional bug fixes and performance improvements we’ve backported from the next major version. Why we use custom builds of Ruby Shopify has one of the largest and highest traffic
Rewriting the Ruby parser
At Shopify, we have spent the last year writing a new Ruby parser, which we’ve called YARP (Yet Another Ruby Parser). As of the date of this post, YARP can parse a semantically equivalent syntax tree to Ruby 3.3 on every Ruby file in Shopify’s main codebase, GitHub’s main codebase, CRuby, and the 100 most popular gems downloaded from rubygems.org. We recently got approval to merge this work into C
Monitoring YJIT in Production
YJIT is a JIT compiler for Ruby that Shopify has developed. In 2022, we enabled YJIT in all storefront requests and observed ~10% speedups. Do you use an app performance monitor like NewRelic or Scout, or check your daily performance graphs? Here’s how you can make sure YJIT is doing what you want when you monitor. Use what you already have We work hard to make YJIT efficient on various workloads
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