Immutable strings in Ruby 2.3
String literals immutability is one of the new features you can find in Ruby 2.3. But, what does this imply? Same value literals points to the same object Better performance Thread safety Currently string immutability is included as opt-in, being the first step of a multi stage rollout and if it works well it will be enabled by default on Ruby 3.0. So it still can end up being just an experiment.
The Definitive Guide to Ruby Heap Dumps, Part I
In my last post, we looked at how you can dig into memory "leaks" on Heroku. These techniques all work well if you can reproduce the memory bloat locally. When you can't, we can take a "heap dump" off of a running production server and analyze it for more information. In this two-post series, we'll look at the basics of what a heap dump is, what the contents look like, how to analyze one, and how
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