Power and Performance Group Lab

A Podkey summary of Power and Performance Group Lab, from WWDC 2026.A lot of this week’s developer news comes down to one theme: making performance work less guessy and a lot more visible. There are better tools for comparing instrument runs, clearer ways to read launch time, new MetricKit upgrades for Swift, and a bunch of practical advice for SwiftUI, background tasks, and even heat and battery limits in the real world. It’s the kind of update that doesn’t sound flashy at first, but if you’ve ever spent hours trying to figure out why an app feels a little off, this is the stuff that saves your week.Comparing runs without the window shuffleMetricKit gets a more natural Swift APILaunch time gets faster for free, mostlyWhat’s really slowing launchSwiftUI and the hidden cost of redrawingEnvironment churn and big listsState reporting makes metrics more usefulBackground work that cooperates with the systemTesting for heat, battery, and older-device realityBenchmarking without over-optimizingThis podcast was created with Podkey. Make your own at https://podkey.fm