performance

Building apps is a system design exercise

Working in the modern abstraction level

Oct 22 • Jacob Bartlett

Background work in iOS

...and how iOS 26 made it better

Oct 14 • Jacob Bartlett

NFC, BLE, UWB, WTF?!

How iOS talks to your hardware

Sep 30 • Jacob Bartlett

Forbidden iOS 👹

7 more things Apple doesn't want you to know

Sep 16 • Jacob Bartlett

App Size 101: Drop 40% in an afternoon

Fix the 5 most common low-hanging fruit

Sep 9 • Jacob Bartlett

Designing The Perfect Modular Architecture

Applying everything I've learned across 10 years of building

Jul 29 • Jacob Bartlett

UIKit for scroll performance!? Real engineers use Metal.

Actually hitting 120fps on a Photos app clone

Jun 23 • Jacob Bartlett

How did Apple cut launch time by 30% in iOS 27?

An Instruments-flavoured optimisation deep-dive.

Jun 17 • Jacob Bartlett

Apple Chip Architecture from 1977 to 2026

The full silicon story: from Apple I to M5 (and beyond!)

Jun 9 • Jacob Bartlett

My Secret Plot to Kill SwiftUI

A playbook for returning to normalcy

Jun 1 • Jacob Bartlett

Reliable Data Uploading on iOS

4 levels of confidence: simplicity, resilience, continuity, and durability

May 20 • Jacob Bartlett

Touch to Pixels: UI Pipeline Internals on iOS

A journey through hardware, backboardd, Core Animation, and the render server

May 13 • Jacob Bartlett

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