Stacktrace

John Sundell and Gui Rambo

A podcast about life and technology from two developers’ perspectives. With John Sundell and Gui Rambo.

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21 episodes
monthly
Avg 1 hr 8 min
English

Episodes 21

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Tuesday · 1 hr 12 min
210: ”Just bytes in a pipe”
John and Rambo revisit the topic of closures and how their use has evolved since Objective-C’s blocks, and then go on a behind-the-scenes deep dive into AirBuddy 3.
July 31 · 48 min
209: “False positives or positive negatives”
John and Rambo discuss the pros and cons of using AI assistants and agents in the context of open source, as well as how unit testing has evolved on Apple’s platforms during the last few years, with the introduction of tools such as Swift Testing.
June 22 · 1 hr 7 min
208: “You are the compiler”
John and Rambo discuss some of the new APIs and technologies introduced at WWDC26, including new Swift features, and changes to frameworks like AppKit and FoundationModels. Also, the state of Swift 6, and WWDC video watching strategies.
May 13 · 1 hr 10 min
207: “It’s not magic, it’s all in the kernel”
John builds a cross-platform UI framework in Rust, and Rambo uses the macOS virtualization system to create a virtual iPhone.
April 8 · 53 min
206: “Let’s deprecate Xcode projects”
Using Android as an iOS user, and the state of Swift Package Manager, including how it could become a more full-featured orchestration tool for Xcode projects.
March 11 · 1 hr 6 min
205: “The 2026 edition”
On this first episode of the 2026 season, John and Rambo discuss how they’re using AI agents when working on different projects, and how to approach learning new programming languages in 2026.
May 14, 2024 · 1 hr 3 min
204: “Ship a prompt”
Stacktrace is back! John and Rambo check their hype levels for WWDC24, and discuss how AI might fit into Apple’s plans for this year’s releases. Also, Xcode wishes, and the challenges of building distributed systems.
Dec 18, 2023 · 1 hr 15 min
203: “The Sherlock Holmes of debugging”
John and Rambo reflect on what they’ve been learning and how they’ve been aiming to improve as developers during 2023. Also, tips for getting better at debugging, deploying generative AI within existing apps, and are view models really such a good fit for SwiftUI views?
Nov 6, 2023 · 1 hr 4 min
202: “Incrementing the integer”
Reactions to Apple’s “Scary fast” event, Rambo’s review of the iPhone 15 Pro Max, and under the hood of CleanupBuddy.
Sep 7, 2023 · 1 hr 6 min
201: “USB-C utopia”
Will this year’s iPhones switch to USB-C instead of Lightning, what could an Apple Watch Ultra-style action button be used for on a phone, and will Apple give us another look at the Vision Pro at their upcoming “Wanderlust” event?
Jul 31, 2023 · 1 hr 10 min
200: “Expectation recalibration”
Rambo’s custom implementation of macOS desktop widgets and how they relate to Apple’s new built-in system feature, why the experience of using SwiftUI depends so much on the environment it’s being used in, and a mini-review of the ASUS ROG Ally.
Jun 22, 2023 · 1 hr 18 min
199: “Taking the cover off the API”
John and Rambo start diving into the new announcements from WWDC23 — including the Apple Vision Pro and visionOS, the new Apple Silicon-powered Mac Pro, as well as many of the updates to Apple’s various operating systems.
Jun 1, 2023 · 1 hr 23 min
198: “WWDC23 Keynote Poker”
With the start of WWDC23 just around the corner, John and Rambo share their predictions, hopes, and dreams as to what Apple might introduce during this year’s edition of the conference. It’s Keynote Poker time!
May 12, 2023 · 39 min
197: “Perceived fluidity”
Reducing UI flickering, designing in-app purchase and signup flows, and how adding delays can interestingly make a UI feel more smooth and stable.
Apr 24, 2023 · 1 hr 16 min
196: “That new Mac smell”
Integrating AI-powered features into an iOS app, using high refresh rate monitors with a Mac, the advantages of simple abstractions, and how the M1 and M2 Max compare in terms of Xcode work.
Mar 13, 2023 · 1 hr 24 min
195: “The Swift historian”
John and Rambo celebrate the 5-year anniversary of the show by looking back at how their work and the technology they use have changed since the beginning of the show. Also, how might things change during the next 5 years, specifically when it comes to machine learning, AR, and the openness of Apple’s platforms?
Feb 16, 2023 · 1 hr 18 min
194: “Definitely not called a puppy”
How game controllers communicate with a Mac, handling asynchronous data and actions in SwiftUI, and various ways to use view models within a code base.
Jan 12, 2023 · 1 hr 14 min
193: “Build your own Mac”
Thoughts on the most recent Mac Pro rumors, building custom layouts for SwiftUI views in a backward-compatible manner, and the mechanics of making a UI interaction feel responsive and fluid.
Dec 21, 2022 · 1 hr 21 min
192: “Sundell Silicon”
Building computers, running A/B tests as an indie developer, using UIKit as a layout tool for SwiftUI views, and deciding whether to use Core Data or a more simple on-disk data storage solution.
Nov 24, 2022 · 53 min
191: “Back to the future”
Building custom collection view layouts, introducing new features into a legacy code base, and managing patch releases while also working on a major new version of an app at the same time.

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