What is Ruby doing on Rails?
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Hello Weather - Inside the weather machine
How we manage 100k requests per day with multiple data providers in real time with autoscaling and fallbacks.
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The world is complex and we can’t make the complexity go away. The art is in distributing the complexity throughout the code such that a human can understand what the application does, in spite of the complexity.
Many apps have test suites that run exponentially slower as business complexity grows. This is painful to developer productivity and resource efficiency. In this piece, I’ll show you how I’ve made my tests run 70% faster by changing a few lines.
Koichi Sasada (ko1) and Yusuke Endoh (mame) from Cookpad give their thoughts on Ruby 2.7 changes.

Ruby 2.7 is out with experimental pattern matching support. This demo shows the use of the new pattern matching in extracting data from YAML files.
Beyond Ruby
With HTTP/1.1 it was required to open 1 TCP connection per request, with HTTP/2 1 connection is opened per domain. Instead of delegating parallelism to compound documents, we can now actually rely on the protocol itself to handle this.

Having your code reviewed can be daunting. But it can also be very helpful. As reviewers, we can make the difference. Here are five tips to make your code reviews more helpful to the author.

It’s strange how many people who work or communicate in a distributed fashion treat the transmission of their voice as an afterthought.
Blast from the past
"It’s not about Fridays. It’s about having a healthy ecosystem and feedback loop where you trust your deploys, where deploys aren’t a big deal, and they never cause engineers to have to work outside working hours."
Everything is going to hell and nobody seems to care.

Gem of the week
A shadow requesting tool for rack-based apps