iOS
Articles on iOS performance, Swift optimization, Xcode tooling, and building fast Apple platform apps.
iOS engineering articles 301–330 of 733
Improving Video Cache Hits on Swiggy Apps
Swiggy was bleeding money on video bandwidth costs. The culprit? Videos being requested at 270px, 272px, 275px... you get the idea.
Distributed Load Testing Using Locust
Glance's engineering team scaled their load testing from basic scripts to a full Kubernetes-powered distributed system. Here's how they did it with Locust.
Determining Exact Photo Storage Size in Swift
Timotius Leonardo Lianoto from IDN Engineering discovered his iOS app was reporting 13 MB for a 2.8 MB photo. The culprit? A common mistake thousands of developers make when calculating image file sizes.
On-Demand Resources for Lottie Animation Storage in Swift
Bevan Christian from IDN Engineering tackles a problem every mobile team faces: beautiful Lottie animations that bloat your app size. His solution? On-Demand Resources that cut initial download size while keepi...
Advanced Lottie Animation Memory Management in iOS
Timotius Leonardo Lianoto from IDN Media discovered their livestream gift animations were silently eating memory with every play. Even following Lottie's official docs didn't prevent the leak.
Kotlin Multiplatform Money Formatter
Patrick Tyska and Terry Yiu from Cash App reveal how the same $1,000 needs to display four different ways across their app. Their solution? Kotlin Multiplatform to consolidate 10 separate money formatters into ...
Instant Feedback in iOS Engineering Workflows
Instagram engineers were losing hours every day waiting for code to compile. So they brought React Native's ⌘R instant refresh experience to native iOS.
How DoorDash uses XcodeGen to eliminate project merge conflicts
Md Al Mamun and Michael Thole from DoorDash reveal how their 100+ engineer iOS team eliminated project merge conflicts entirely. The secret? A command-line tool that turns hours of painful XML debugging into se...
Network Latency Issues in Mobile Apps
Anatole Beuzon and Bowen Chen from Datadog turned what seemed like a simple deployment alert into a months-long debugging odyssey. What they uncovered reveals how deceptively complex network latency issues can ...
Achieving Higher Test Coverage: Our Approach to UI Testing on iOS
Aliou Sarr from leboncoin reveals how shifting UI test ownership from QA to developers doubled their test count in under a year. The result? A 99.6% crash-free iOS app serving 28 million monthly users.
How We Improved Testing Processes Using Ephemeral Environment
Swiggy was missing production deadlines because their UAT environments were constantly unstable or unavailable. Sound familiar?
The future of iOS development with Flutter
Leigha Jarett from Flutter reveals how Google's cross-platform framework is becoming a serious contender for iOS development. With over 1 million apps built and major players like BMW and WeChat on board, the i...
How Server Driven UI is Helping Frontend Engineers Scale Impact
Robinhood was taking weeks and multiple engineers just to make minor UI tweaks. Their Server Driven UI platform cut that to hours with one engineer.
2023 Google Mobile Ads Updates for Flutter
Timothy Hoang from Google just dropped major updates to Flutter's mobile ads plugin. If you've been writing platform code just to customize native ads, that pain point is officially solved.
Flexible Continuous Integration for iOS
Michael Bachand and Xianwen Chen from Airbnb rebuilt their entire iOS CI system—and cut maintenance time while running 10 million minutes of jobs quarterly. Here's how they ditched 300+ physical Macs for AWS in...
Measuring Performance for iOS Apps | App Startup
Uber's iOS app startup metrics became 130% inflated overnight. The culprit? iOS 15's pre-warming feature broke their entire measurement system.
Why xHE-AAC is being embraced at Meta
Meta serves billions of users with wildly inconsistent audio uploads. Their solution? A codec that adapts audio quality in real time without burning in compression.
Load Testing for 2022 Spotify Wrapped
Spotify Wrapped serves 150M+ users in a single morning. How do you load test for that kind of thundering herd?
Performance Optimization Guide
Snap's AR Lenses reach millions, but performance issues can kill engagement before users even see your creation. Here's how Snap ensures their AR experiences work across every device.
Mobile Lens Profiler: Case Study
Snap's engineering team just dropped a masterclass in mobile performance debugging. Ever wonder why your AR lens stutters on the first frame?
Mobile Monitor
Snap's Lens Studio just gave AR developers a powerful weapon against performance issues. If your lenses are failing submission due to slow activation or low FPS, this tool is your answer.
Lens Performance Toolkit
Snap's Lens Performance Toolkit has been sunset, but its replacement Mobile Monitor offers AR developers something better. Here's what changed and why it matters for your lens performance.
The Journey to Server Driven UI At Lyft Bikes and Scooters
Lyft Bikes & Scooters was drowning in complexity: 3 vehicle types, multiple markets, and endless switch statements. Their solution? Move the UI logic to the server.
App Modularization and Module Lazy Loading at Instagram and Beyond
Instagram's app was getting bloated. More engineers, more features, slower cold starts, and ballooning app size threatened the lean experience users loved.
Building a Modern iOS Networking Library with Swift Concurrency
Emre Havan from Getir rebuilt their entire iOS networking stack from scratch. The result? A modern, async-first library that eliminated memory leaks and cut boilerplate code—but not without hitting some painful...
Building a Multi-Pipeline CI Setup for Running Automated Tests in GitLab
Gojek's engineering team cracked a common CI/CD headache: how do you run automated tests from a separate repo without creating pipeline chaos?
Handling Multiple Caches in App
Swiggy's mobile team faced a common problem: juggling disk caches, LRU caches, and databases without creating a maintenance nightmare. Here's their elegant solution.
The evolution of Facebook’s iOS app architecture
Meta's Facebook iOS app went from a 30-second launch time disaster to one of the most sophisticated mobile architectures in the world. Here's how they did it over 10 years.
How We Reduced Our iOS App Launch Time by 60%
Filip Busic from DoorDash reveals how three targeted optimizations slashed iOS app launch time by 60%. The culprits? String operations, hashing strategies, and sneaky third-party framework initializers.
How We Reduced Our iOS App Launch Time by 60%
DoorDash cut their iOS app launch time by 60%. Here's how they did it with three targeted optimizations that any mobile team can learn from.