Ruby On Rails

Tutorials

How to relax your Ruby version specification in your Gemfile

How to relax your Ruby version specification in your Gemfile Have you ever run into this error?Your Ruby version is 2.6.1, but your Gemfile specified 2.6.3Annoying, right? You know your Ruby version is new enough to run this application, but the Gemfile is so fussy.Turns out, Gemfiles don't have to be so pi...

Rails 6 adds Array extract!

Rails 6 adds Array extract! This blog is part of our Rails 6 series. Rails 6.0.0.rc1 was recently released.Rails 6 added extract! on Array class. extract! removes and returns the elements for which the given block returns true.extract! is different from reject! in the way th...

Why is Ruby Slower on Mac? An Early Investigation

Why is Ruby Slower on Mac? An Early Investigation Sam Saffron has been investigating Discourse test run times on different platforms. While he laments spending so much extra time by running Windows, what strikes me most is the extra time on Mac — which many, many Rubyists use as their daily drive...

Instance Variable Performance

Instance Variable Performance This code defines a class that sets a bunch of instance variables, but the order that the instance variables are set depends on the parameter passed in to the constructor. When we pass true, it defines instance variables “a” through “zz”, and when...

Level Up Your Ruby Skillz: Writing Compact Code

Level Up Your Ruby Skillz: Writing Compact Code We have all been there, we issue a Pull Request(PR) that we feel is super tight and awesome. It gets stamped "Approved", but there is a catch. Our code isn't actually as tight as we thought. We open up our PR to a bunch of very nice suggestions on...

Switching From Resque to Sidekiq

Switching From Resque to Sidekiq A year ago at Kenna, we had our background processing jobs split between Sidekiq and Resque. We had our long-running jobs in Resque which could handle rolling restarts every time we deployed so we didn't have to worry about long running jobs getti...

Ludicrously Fast Page Loads - A Guide for Full-Stack Devs

Ludicrously Fast Page Loads - A Guide for Full-Stack Devs Server response times, while easy to track and instrument, are ultimately a meaningless performance metric from an end-user perspective. Actual end-user response to the word ‘microservices’ End-users don’t care how fast your super-turbocharged bar...

Hacking Your Webpage's Head Tags for Speed and Profit

Hacking Your Webpage's Head Tags for Speed and Profit Most of us developers settle for page load times somewhere between 3 and 7 seconds. We open up the graph in NewRelic or webpagetest.org, sigh, and then go back to implementing that new feature that the marketing people absolutely must have deploye...

rack-mini-profiler - the Secret Weapon of Ruby and Rails Speed

rack-mini-profiler - the Secret Weapon of Ruby and Rails Speed rack-mini-profiler is a powerful Swiss army knife for Rack app performance. Measure SQL queries, memory allocation and CPU time.rack-mini-profiler is a a performance tool for Rack applications, maintained by the talented @samsaffron. rack-mini-pro...

100ms to Glass with Rails and Turbolinks

100ms to Glass with Rails and Turbolinks A perceived benefit of a client-side JS framework is the responsiveness of its interface - updates to the UI are instantaneous. A large amount of application logic (and, usually, state) lives on the client, instead of on the server. The client-sid...

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