In this episode of Dead Code, Jared interviews Ivo Anjo, a Ruby performance expert at Datadog, about Ruby’s concurrency model and his work improving visibility into it. They discuss the Global VM Lock (GVL), which simplifies Ruby’s internals but hinders multithreading, and explore the promise and current limitations of M:N scheduling, now partially implemented via Ractors in Ruby 3.4. Ivo created the gvl-tracing gem to visualize thread behavior and uncover subtle bugs, advocating for a more intelligent, OS-like scheduler to improve performance fairness. He also shares insights from building Datadog’s always-on production profiler and his direct-bind gem, which allows low-level access to Ruby internals when official APIs fall short. Overall, the episode highlights a growing movement of developers modernizing Ruby’s internals and pushing past its reputation for being slow.Links:gvl-tracingdirect-bindStackProfrbspyRactorsYJITRubyConfRubyKaigiEuRuKo 2025Dead Code Podcast Links:MastodonXJared’s Links:MastodonXtwitch.tv/jardonamronJared’s Newsletter & WebsiteEpisode Transcript Hosted on Acast. See acast.com/privacy for more information.
--------
49:55
--------
49:55
Herbicide (with Marco Roth)
In this episode of Dead Code, Jared talks with Marco Roth about Herb, a new fault-tolerant parser for HTML and ERB designed to improve the developer experience in the Rails ecosystem. Unlike tools like Deface or Nokogiri, Herb doesn’t auto-correct or mask errors—it parses templates exactly as written, enabling better diagnostics, formatting, and linting for server-rendered views, especially in Hotwire, Turbo, and Stimulus contexts. Built in C for portability and speed, Herb can be used across Ruby, JavaScript, and browsers via WebAssembly. Marco created it after running into limitations with existing tooling while building the Stimulus LSP. Future plans include deeper integration with tools like Ruby LSP and possibly enabling LiveView-style reactive rendering in Rails. Developers can try it today via a VS Code extension or the interactive web playground.Links:DefaceSpreeSolidusNokogiriRuboCopPrismHerbHerb PlaygroundHerb VS Code ExtensionHotwireTurboStimulusStimulusReflexPhoenix LiveViewRuby LSPEpisode 10 with Kevin Newton on PrismEpisode 38 with Carson Gross on HTMX Dead Code Podcast Links:MastodonXJared’s Links:MastodonXtwitch.tv/jardonamronJared’s Newsletter & WebsiteEpisode Transcript Hosted on Acast. See acast.com/privacy for more information.
--------
29:04
--------
29:04
Coffee Grindcore (with Alan Ridlehoover)
In this episode of Dead Code, Jared talks with Alan Ridlehoover, Senior Engineering Manager at Cisco Meraki, about managing software complexity through clear abstractions and thoughtful design. Using a metaphor of a vending-style coffee machine, Alan explains how complexity often arises not from algorithms but from code that’s hard to understand due to excessive abstraction or poor structure. He emphasizes focusing on the readability of what’s directly in front of you, using tools like flog and the ABC metric to quantify complexity, while also trusting gut instinct and applying heuristics like Sandi Metz’s five-line rule. Alan discusses minimizing over-engineering, favoring well-named private methods over inline comments, and stresses that code and commit messages—not comments—should tell the story. He also introduces “rehydration,” the process of adding back duplication to reveal better abstractions, helping developers make their code more maintainable and easier to change over time.Links:Flog (Ruby)ABC MetricGerritDRY Principle (Don’t Repeat Yourself)Domain-Driven Design (DDD)PolymorphismDead Code Podcast Links:MastodonXJared’s Links:MastodonXtwitch.tv/jardonamronJared’s Newsletter & WebsiteEpisode Transcript Hosted on Acast. See acast.com/privacy for more information.
--------
38:47
--------
38:47
Wish Granted (with Scott Werner)
In this episode of Dead Code, Jared chats with Scott Werner, CEO of Sublayer, about his experimental AI web framework, Monkey’s Paw—a Ruby-based tool that uses natural language prompts to generate web pages, embracing LLM “hallucinations” as a creative feature rather than a flaw. Designed to bring back the playful spirit of early Web 2.0, Monkey’s Paw allows developers to prototype ideas quickly and unexpectedly, often resulting in delightful, unintended features like auto-generated tooltips. Scott explains how the project reflects a broader shift toward ephemeral, AI-assisted development and introduces Sublayer, his minimal agent framework built for AI generation. Both Jared and Scott agree that while LLMs may not produce enduring art, they offer fun, whimsy, and new ways to experiment in coding, highlighting how these tools can be valuable outside of pure productivity or profit-driven goals.Links:Monkey’s PawSublayerArtificial RubyWorks on My Machine (Substack)WebsimTRICK CompetitionRails GeneratorsPowerPoint CopilotDead Code Podcast Links:MastodonXJared’s Links:MastodonXtwitch.tv/jardonamronJared’s Newsletter & WebsiteEpisode Transcript Hosted on Acast. See acast.com/privacy for more information.
--------
27:52
--------
27:52
Pickaxe Resurrection (with Noel Rappin)
Short-Form Summary:In this episode of Dead Code, host Jared chats with Noel Rappin, Staff Engineer at Chime and co-author of the updated Programming Ruby (“The Pickaxe Book”), about revitalizing Ruby’s most iconic reference. Rappin explains that despite claims Ruby is “dead,” it’s still widely used by startups and major companies like GitHub and Shopify. He took on the update to bridge the gap between Ruby 2.0 and 3.3, modernizing the book to reflect new features like pattern matching and changes in the ecosystem, while keeping it relevant for today’s developers, many of whom are coming from JavaScript, Python, or Java. They discuss the balance between Ruby’s flexible syntax and emerging norms via tools like RuboCop, the cautious use of metaprogramming, and how Ruby’s expressive power still stands out. Rappin hints at a future Ruby 4 update and encourages developers to embrace Ruby’s strengths, especially for teams valuing agility and clarity.Links:Noel RappinDave ThomasProgramming Ruby (The Pickaxe Book)why’s (poignant) Guide to RubyBundlerRuboCopStandardRBRactorsPattern Matching in RubySorbetRBSSteep Dry-typesSinatraRSpecConcurrent RubyFibersDead Code Podcast Links:MastodonXJared’s Links:MastodonXtwitch.tv/jardonamronJared’s Newsletter & WebsiteEpisode Transcript Hosted on Acast. See acast.com/privacy for more information.
The software industry has a short memory. It warps good ideas, quickly obfuscating their context and intent. Dead Code seeks to extract the good ideas from the chaos of modern software development. Hosted on Acast. See acast.com/privacy for more information.
Listen to Dead Code, The AI Daily Brief (Formerly The AI Breakdown): Artificial Intelligence News and Analysis and many other podcasts from around the world with the radio.net app
Ireland