iOS × Scroll Performance
iOS Scroll Performance
We track 13 iOS Scroll Performance case studies from 10 engineering teams. Zalando, DoorDash and Dropbox write about it most. Many posts also cover SwiftUI and UI Performance. The posts run from 2014 to 2026. The newest is from March 2026.
iOS Scroll Performance articles 1–13 of 13
Is SwiftUI finally as fast as UIKit in iOS 26?
Jacob Bartlett puts SwiftUI and UIKit through the ultimate stress test: a feed of 22,000 animated GIFs running at 120fps. The results might surprise you.
SwiftUI Scroll Performance: The 120FPS Challenge
Jacob Bartlett from Jacob's Tech Tavern puts SwiftUI scroll performance under the microscope. Can it really hit 120fps with complex infinite feeds, or does the magic come at too high a cost?
Optimizing UITableView Scrolling Performance with Prefetching
Bevan Christian from IDN Engineering tackles a problem every iOS dev knows: that janky scroll when images load in UITableView. His solution? iOS's built-in prefetching API that most developers overlook.
Optimising Scrolling Performance with Litho
Swiggy's Android team was hitting scroll performance walls with traditional RecyclerViews. Their solution? Facebook's Litho framework, which delivered massive performance gains.
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.
Implementing iOS Collection View with Efficient Rendering Mechanism
Tokopedia's iOS team was crashing on UICollectionView batch updates. Their solution? Build a better abstraction inspired by Instagram and SwiftUI.
Implementing Infinite Scrolling Efficiently
Phong Lam from Walmart Global Tech tackles a problem every mobile dev faces: infinite scroll that doesn't tank performance. His solution? Stop rendering everything and start being strategic.
iOS App Performance
Monzo's iOS app got 60% slower over time, and their team structure was partly to blame. Here's how they fixed it and prevented it from happening again.
Detecting List Items Observed by User
Zalando's engineering team faced a tricky challenge: how do you know if a user actually *saw* an item in a scrolling list, not just flew past it?
Better List Views
React Native just killed ListView. The new list components solve memory leaks, stale rows, and ignored bugs that plagued mobile developers for years.
Improving Chat Rendering Performance
Twitch was dropping frames like crazy. Chat messages were taking 200ms to render when they had just 16.667ms to work with for smooth 60fps video.
Proper Use of CellForRowAtIndexPath and WillDisplayCell
Zalando's iOS team challenges a widely-cited performance myth about UITableView that's been misleading developers for years.
Building Carousel Part II: Speeding Up the Data Model
Dropbox engineers faced a brutal reality: reading 5,000 photos from SQLite took a full second on a Nexus 5. For users with 100,000+ photos, the standard approach would be unusable.