An analysis of memory bloat in Active Record 5.2
Current patterns in Active Record lead to enormous amounts of resource usage. Here is an analysis of Rails 5.2
Managing db schema changes without downtime
How we manage schema changes at Discourse minimizing downtime
Reducing String duplication in Ruby
It is very likely your Rails application is full of duplicate strings, here are some tricks you can use to get rid of them.
Instrumenting Rails with Prometheus
How we instrument Rails at Discourse and how you can, too.
Debugging 100% CPU usage in production Ruby on Rails systems
How do you go about debugging high CPU usage in a production Rails system?
Fastest way to profile a method in Ruby
What is the fastest and most elegant way to instrument a method in Ruby?
The current state of Brotli compression
Chrome recently pushed out support for Brotli, in this post I will cover what this means to you.
WebSockets, caution required!
WebSockets seem to be gaining a resurgence, suddenly they are sexy again. I think this is the wrong message.
Fixing Discourse performance regressions
Recently, I discovered a performance regression on a very common page on Discourse. This post documents my approach and specific fixes I applied.
Debugging memory leaks in Ruby
Tools, tips and techniques for diagnosing and fixing Ruby memory leaks