iOS
Articles on iOS performance, Swift optimization, Xcode tooling, and building fast Apple platform apps.
iOS engineering articles 361–390 of 733
How Optimizing Memory Management with LMDB Boosted Performance on Our API Service
Pinterest's API team just freed up 4.5GB of memory per host with a clever database swap. The result? Fewer servers, happier users, and a masterclass in optimization.
Building A Performant iOS Profiler
Indragie Karunaratne from Sentry reveals how they built a production-ready iOS profiler that runs on millions of real user devices. Most profilers only work locally, but this one collects real-world performance...
How to Create Dynamic Island and ActivityKit with Flutter
Amorn Apichattanakul from KBTG shows Flutter developers how to tap into iOS's Dynamic Island feature. Yes, you can build Live Activities in Flutter apps—here's the bridge you need.
App Performance Monitoring Strategies and Tools
Your app crashes in production and you have no idea why. Callstack breaks down the monitoring strategies that catch issues before your users do.
Async/Await in Swift: Modern Concurrency Patterns
Asukhija from Expedia Group shows how two simple keywords can eliminate callback hell in Swift. If you've ever drowned in nested closures, this is your lifeline.
Consent Matters
Swiggy's Android team faced a UX dilemma: auto-reading OTPs felt magical to some users, creepy to others. How do you balance convenience with transparency?
Productionizing Envoy Mobile at Lyft
JP Simard from Lyft reveals how they replaced URLSession and OkHttp across all their mobile apps with a single networking library—and the results weren't what anyone expected.
Adopting SwiftUI with a Bottom-Up Approach to Minimize Risk
DoorDash just proved SwiftUI is enterprise-ready. Their secret? Don't start with a rewrite.
How We Improved Our iOS App Compile Time by 99%
Zomato's iOS team was stuck waiting 80 seconds for every incremental build. That's developer productivity bleeding out in real-time.
First Annual Bazel iOS Con 2022
Jerry Marino and Square are bringing the Bazel iOS community together for the first time. If you're building iOS at scale, this conference agenda reveals where the ecosystem is heading.
Building iFood's iOS Cart Experience
iFood's iOS team built a checkout system that handles 25+ feature plugins without turning into spaghetti code. Here's how they architected a platform that lets multiple teams ship independently.
Build Time Optimizations in Xcode
Swiggy's iOS team cut build times by 21% and saved developers hours of waiting. Here's their battle-tested playbook.
How We Made Unit Testing Part of Our Engineering Culture
Instawork runs over 1 million tests daily in their CI pipeline. Here's how they made unit testing a core engineering practice, not an afterthought.
iOS Screen Navigation Engine at Revolut
Vincent Berihuete from Revolut reveals how they ditched traditional iOS navigation patterns for something far more powerful. Forget Coordinators—this is about building a custom navigation engine that eliminates...
Building m.uber: Engineering a High-Performance Web App
Uber built a web app that loads in 3 seconds on 2G networks. Here's how they made it smaller than a typical image file.
Performance Bottlenecks in Go Apps
Grab's engineering team discovered their Go apps were mysteriously throttling at 1.94 CPU cores but flying at 2 cores. The culprit? A sneaky interaction between Kubernetes VPA and GOMAXPROCS.
Introducing Skynet: Infrastructure as Code for Gojek
Gojek runs 15,000+ VMs across 250+ GCP projects serving millions of customers. How do they manage infrastructure at this scale without chaos?
Programmatic Scrolling with SwiftUI ScrollView
Zoltan Lippai from DoorDash cracked a problem that stumped early SwiftUI adopters: how do you programmatically scroll when Apple didn't give you the tools? His team built their own solution for iOS 13.
Automating Mobile Event Verification
Swiggy was drowning in analytics chaos. Thousands of events per session, scattered specs across docs, and manual verification eating up engineering time.
How Removing Caching Improved Mobile Performance by 25%
Klarna's team removed their caching layer and saw a 25% performance boost. Wait, what?
Improving the CI/CD pipeline for mobile app development
Johnson Li from Coupang reveals how migrating from Mac minis to AWS EC2 transformed their mobile CI/CD pipeline. Their team was drowning in 3,000+ daily builds with 1-hour wait times.
Swift Language Updates from WWDC22
Swift just got a massive upgrade. Feli Bernutz, Matthaus Woolard, and Natalia Panferova break down the Swift 5.6 and 5.7 releases that are reshaping how iOS teams write concurrent, type-safe code.
Build a Flutter app with Very Good CLI and Supabase
Very Good Ventures shows how to build a production-ready Flutter app with Supabase that achieves 100% test coverage. This isn't your typical Firebase clone tutorial.
How Tinder Solves Complex Lottie Localizations with Server Driven UI
Tinder was manually creating 40+ localized Lottie animations for every campaign. Their solution? A clever architecture that reduced it to just one.
Exploring Swift: Property wrappers in the wild
Ting Becker and Paul Hudson curated the best property wrapper resources from the Swift community. If you're still writing boilerplate code in Swift, you're missing out on one of the language's most powerful fea...
Removing 30% of our iOS crashes
Robinhood eliminated 30% of ALL iOS crashes by refactoring a single screen. That screen drove 30% of their revenue at the time.
Why Mobile Apps Performance Matters
Mercado Libre's mobile apps serve 4.5 billion active devices. A Galaxy A10 might take 5 seconds to load a screen—or just 1.67 seconds, depending on conditions.
Advanced Techniques to Speed Up Compile Time in Xcode
Swiggy's iOS team was watching Xcode compile for minutes after single-line changes. They cut that time by 75%.
Validating Social Media URLs in Swift
Alvin Matthew Pratama from Tokopedia tackles a deceptively complex problem: validating social media URLs when each platform has wildly different URL structures. Regex alone won't cut it.
Faster media delivery to optimize app performance
LazyPay was serving unoptimized images directly from S3, killing app performance and burning bandwidth. Their migration to Cloudinary cut image sizes by 70%.